Project Restoration/Build - 1975 Seiko 6138-0049 Bullhead - Seiko & Citizen Watch Forum Japanese Watch Reviews, Discussion & Trading
Reply
 
LinkBack Thread Tools
Old 06-29-2019, 01:30 PM   #1 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default Project Restoration/Build - 1975 Seiko 6138-0049 Bullhead

Well, I have been itching to work on a Seiko 6138 cal chronograph so I took a gamble and picked up this honest and well used Bullhead from an ebay seller in AU. While the watch shows wear, the case lines appear sharp. Crystal is in decent shape and a bit of polishing will make it like new. The dial and hands appear in exceptional condition for their age. I see no servicing marks inside the case back. The case back seal is flat and hard so it looks original to the watch. The chrono functions all work properly. I am suspect that one of the pushers is not original to the watch and may have been replaced with an aftermarket piece but cannot say for certain until I disassemble the watch. I believe original pushers have a slight chamfered edge near the tip. Let me know if I am wrong about this. Watch needs service but is not running that bad for its age. Bezel appears original to the watch but yellow indices have long since faded. Let me know thoughts and insights on condition and the originality of this piece.
Attached Images
File Type: jpg IMG_0086.jpg (178.5 KB, 21 views)
File Type: jpg IMG_0087.jpg (171.9 KB, 19 views)
File Type: jpg IMG_0088-2.jpg (160.3 KB, 18 views)
File Type: jpg IMG_0089-2.jpg (113.8 KB, 21 views)
File Type: jpg IMG_0090.jpg (243.5 KB, 17 views)
File Type: jpg IMG_0091-2.jpg (122.9 KB, 17 views)
File Type: jpg IMG_0092.jpg (284.5 KB, 18 views)
File Type: jpg IMG_0093-2.jpg (287.1 KB, 21 views)
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-29-2019, 04:00 PM   #2 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Disassembled the case and bracelet. These parts need a good soak in some hot soapy water and treating with a soft brush before ultrasound cleaning.
Attached Images
File Type: jpg IMG_0094-2.jpg (141.9 KB, 17 views)
__________________
____________
--John S.--

Last edited by Vette Enthusiast; 06-29-2019 at 10:46 PM.
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 06-29-2019, 05:30 PM   #3 (permalink)
Senior Member
 
zeke441's Avatar
 
Join Date: Dec 2017
Location: Tennessee USA
Posts: 3,384
Points: 294 (+)
Default

Looks like a fun project. Post lots of pics as I have one to hopefully start on soon.
__________________
"A man that wears a watch shows that being on time is important"
Pops - 1979 when he gave me my 1st real watch.

Seiko Saviors
zeke441 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-30-2019, 04:27 PM   #4 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Chronograph pushers. Note the one on the left which I believe to original. Slight groove just below the pusher o-ring and chamfered edges near the top of the pusher. The pusher on the right while similar does not have these characteristics. These pushers do appear to be built differently than 6139 pushers. If anybody has a spare 6138-0040/49 OE pusher in their parts inventory they can spare, please let me know. i am willing to compensate for the item. Thanks.
Attached Images
File Type: jpg IMG_0096-2.jpg (157.8 KB, 17 views)
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-02-2019, 11:13 PM   #5 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

So I contacted forum member Acidstain and he had a couple of OE 6138 pushers to sell me. I have completed the refinish work on the case, bracelet, and crystal but I am waiting on some new seals before assembling and taking pics for posting.

I disassembled the movement this evening and everything was pretty straight forward until I got to the mainspring barrel assembly. There is a small intermediate hour wheel gear and spring on the lower part of the barrel attached to the barrel cover. The tech guide shows this and states it is fixed to the mainspring barrel cover. I did some research on-line and found you do not want to remove that gear. The barrel arbor has a shaft that slips through that gear port on the mainspring barrel cover. Once you crack open the top of the barrel, slip a thin sharp knife in to hold the spring in place and gently slide the barrel cover off. The gear will remain attached to the barrel cover and the mainspring arbor will remain attached to the spring and main body of the barrel. See photo below.
Attached Images
File Type: jpg IMG_0105.jpg (190.6 KB, 14 views)
__________________
____________
--John S.--

Last edited by Vette Enthusiast; 07-03-2019 at 08:41 AM.
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
The Following 2 Members Awarded Vette Enthusiast A Point For This Useful Post:
Old 07-03-2019, 09:58 PM   #6 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Everything cleaned and ready for reassembly.
Attached Images
File Type: jpg IMG_0115-2.jpg (231.7 KB, 9 views)
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-05-2019, 08:25 AM   #7 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

First, for those in the US, let me wish you all happy 4th of July Independence Day. Got the Bullhead up and running this morning. With the holiday yesterday, I spent a few hours assembling the keyless works and the motion side of the movement. One thing I found very difficult with this build was placing the additional calendar pate on the calendar side of the movement after assembling the hour recording wheel hammer and springs and placing the hour recording wheel in place which is under spring tension. The hour recording wheel pinion sticks up through a very small port in the colander plate and you have to guide the plate down over the assembly making sure the hour recording wheel pinion slides through the small port in the plate all while not managing to dislodge the hour recording wheel from it's setting. Took me several attempts and about 30 - 45 minutes of finding around before I was successful. All in all, very pleased with the progress and results thus far. Will post numbers once I let the movement run in for 24 hours.

PS - When I installed the balance assembly and set the movement in motion this morning, it ran for about a minute and then ground to a stop and would not restart. After a few minutes of checking my work, I found that late last night when installing the upper chrono bridge, I had only tightened 2 of the three screws'; the 2 on the left of the plate while the 3rd on the right was loose. Upon snugging up the 3rd screw on the right, the movement set in motion and was off to the races. Had me worried for a moment. Just goes to show how uneven tension on a plate can put the movement in a bind.
Attached Images
File Type: jpg IMG_0127.jpg (124.6 KB, 9 views)
File Type: jpg IMG_0125.jpg (263.1 KB, 11 views)
File Type: jpg IMG_0122.jpg (156.2 KB, 13 views)
File Type: jpg IMG_0121.jpg (238.8 KB, 10 views)
File Type: jpg IMG_0119.jpg (133.6 KB, 10 views)
File Type: jpg IMG_0117.jpg (167.9 KB, 11 views)
File Type: jpg IMG_0116-2.jpg (150.0 KB, 9 views)
__________________
____________
--John S.--

Last edited by Vette Enthusiast; 07-05-2019 at 08:34 AM.
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-05-2019, 02:30 PM   #8 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Just realized, in this picture the return spring for the flyback reset button is not entirely routed properly. I realized this when I went to put the upper chrono plate on last night. The tight bend to the left of the spring wrapped around the upper plate mounting hole should actually wrap around the spring retention post just up and left of where it sets in this picture. Sorry for the error on my part, but wanted to point the error out for others who may be looking in.
Attached Images
File Type: jpg IMG_0122.jpg (156.2 KB, 14 views)
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
The Following Member Awarded A Point to Vette Enthusiast For This Useful Post:
Old 07-05-2019, 04:14 PM   #9 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Posting pics of the case work. Original crystal polished and new crystal seal installed. Case was given a very conservative light polish and the brushing was redone on the entire case. Note radial brushing on the panel at the 6 o'clock. Sides of the case have lateral brushing and this extended around the top of the case where the pushers and crown are located. Lots of taping involved here using 3mm wide watchmakers tape.
Attached Images
File Type: jpg IMG_0135.jpg (192.5 KB, 9 views)
File Type: jpg IMG_0134.jpg (139.3 KB, 9 views)
File Type: jpg IMG_0133.jpg (146.6 KB, 13 views)
File Type: jpg IMG_0132.jpg (143.9 KB, 9 views)
File Type: jpg IMG_0131-2.jpg (166.8 KB, 11 views)
File Type: jpg IMG_0130-2.jpg (163.4 KB, 11 views)
File Type: jpg IMG_0129-2.jpg (165.6 KB, 9 views)
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-05-2019, 04:15 PM   #10 (permalink)
Senior Member
 
mwadner's Avatar
 
Join Date: May 2012
Location: Metro Seattle
Posts: 5,946
Points: 340 (+)
Default

beautiful work John ....
__________________
There's what people want to hear, there's what people want to believe, there's everything else, then there's the truth . (from "The International")
mwadner is online now   Reply With Quote Quick reply to this message
Old 07-06-2019, 09:51 AM   #11 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Put the calendar mechanism together and mounted the dial and hands this morning So far so good. I must say the 6138 stretched the limits of my patience, especially assembly the calendar side of the movement. Everything on the calendar side must be absolutely perfect in order for it to function properly; keyless works, hour recording wheel hammers and spring, etc. I was literally two steps away from completing the calendar side last night and found the day wheel spur was not engaging the gear to change the day wheel. Had to pull the entire calendar plate off and remove the setting lever so I could adjust the small shepherd spring that controls the setting spur correctly. Will likely go easier on the next one but this has certainly been a learning experience for me. Letting the watch run in a bit and making sure everything with the chrono functions properly and resets to zero before casing the watch. More to follow.
Attached Images
File Type: jpg IMG_0138.jpg (126.4 KB, 7 views)
File Type: jpg IMG_0139-2.jpg (76.6 KB, 5 views)
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-06-2019, 09:51 AM   #12 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Quote:
Originally Posted by mwadner View Post
beautiful work John ....
Thank you for the kind words.
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-06-2019, 02:33 PM   #13 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Time Grapher results with movement cased. Given this watch is over 40 years old and I cleaned and reused the original mainspring, I am pleased with the results. Have I achieved better, yes, but overall good timekeeping performance for my first 6138 service. I ran into some issues with some rusted pins on the bracelet so I am soaking it in WD40 and have some tools on order. Hope to bring you a wrist shot later this week. Thanks for looking.
Attached Images
File Type: jpg IMG_0141-2.jpg (267.8 KB, 6 views)
File Type: jpg IMG_0143.jpg (196.8 KB, 8 views)
File Type: jpg IMG_0142-2.jpg (233.0 KB, 8 views)
__________________
____________
--John S.--

Last edited by Vette Enthusiast; 07-09-2019 at 07:21 AM.
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-06-2019, 02:45 PM   #14 (permalink)
Senior Member
 
jringo8769's Avatar
 
Join Date: Feb 2014
Location: Jamestown NY
Posts: 5,683
Points: 62 (+)
Default

Excellent work...thank u for sharing it...can not wait to see it on your wrist...God Bless,John
love the metal finishing too...
__________________
"Only two defining forces have ever offered to die for you:
1. Jesus Christ

2. All the Soldiers around the World who fought for the lives and freedoms we have today

One hung on the cross and died for your soul

Our Soldiers bled and died for our freedom and we owe them everything...please never forget that...

The Republic will cease to exist when the government takes away from those who are willing to work to give to those who are not.
Unknown....

"This is what the Lord says: 'Stand at the crossroads and look; Ask for the ancient paths, ask where the good way is, and walk in it, and you will find rest for your souls.' " (Jer. 6:16)
jringo8769 is online now   Reply With Quote Quick reply to this message
Old 07-06-2019, 03:00 PM   #15 (permalink)
Senior Member
 
DonJ53's Avatar
 
Join Date: Feb 2017
Posts: 2,267
Points: 121 (+)
Default

Great job John. How thick is it.
DonJ53 is offline   Reply With Quote Quick reply to this message
Old 07-06-2019, 04:10 PM   #16 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Quote:
Originally Posted by DonJ53 View Post
Great job John. How thick is it.
Don, the watch does wear tall on the wrist. As it has a slight wedge shape profile the high end measures roughly 14mm and the low end 10mm thick.
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-06-2019, 04:13 PM   #17 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Well, after soaking the bracelet in WD40 for a few hours, I managed to remove the 2 split pins on the two links I needed to remove to size the bracelet. A wrist shot puts a wrap on this project. An interesting timepiece and design concept to say the least. Very cool.
Attached Images
File Type: jpg IMG_0146-2.jpg (311.9 KB, 6 views)
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-06-2019, 04:14 PM   #18 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Quote:
Originally Posted by jringo8769 View Post
Excellent work...thank u for sharing it...can not wait to see it on your wrist...God Bless,John
love the metal finishing too...
Thank you sir.
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-06-2019, 04:56 PM   #19 (permalink)
Senior Member
 
jringo8769's Avatar
 
Join Date: Feb 2014
Location: Jamestown NY
Posts: 5,683
Points: 62 (+)
Default

well if u ever want to take one some metal finishing...i have a 6105 case that would love to look like your work...with my hands not what they should be and with my eyes even worse...i am scared to even try metal work like i used too...love to see someone making it look as it should...i know how hard it can be to do this too..God Bless,John...we all thank u for sharing it with us...gives us all hope...
__________________
"Only two defining forces have ever offered to die for you:
1. Jesus Christ

2. All the Soldiers around the World who fought for the lives and freedoms we have today

One hung on the cross and died for your soul

Our Soldiers bled and died for our freedom and we owe them everything...please never forget that...

The Republic will cease to exist when the government takes away from those who are willing to work to give to those who are not.
Unknown....

"This is what the Lord says: 'Stand at the crossroads and look; Ask for the ancient paths, ask where the good way is, and walk in it, and you will find rest for your souls.' " (Jer. 6:16)
jringo8769 is online now   Reply With Quote Quick reply to this message
Old 07-06-2019, 09:26 PM   #20 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Quote:
Originally Posted by jringo8769 View Post
well if u ever want to take one some metal finishing...i have a 6105 case that would love to look like your work...with my hands not what they should be and with my eyes even worse...i am scared to even try metal work like i used too...love to see someone making it look as it should...i know how hard it can be to do this too..God Bless,John...we all thank u for sharing it with us...gives us all hope...
John - I would be happy to take a look at your 6105 case for you. I will PM you with my contact info if you are interested. I always try and take a conservative approach to case refinishing; no large buffing wheels or the sort. Everything I do is by hand with some light sanding using a small square blocking dowel and various grits of wet/dry sandpaper (600, 1000, 1500, 2000, 3000, 5000) and light polishing using only my hand held dremel tool and some buffing pads with Wenol Metal Polish and then a final rub using a Cape Cod cloth. Brushed finishes are usually achieved using a 3M Super Fine Scotchbrite pad (Grey). I am not going for perfection but what looks aesthetically pleasing to my eye. Thanks for your kind words and continued support.
__________________
____________
--John S.--

Last edited by Vette Enthusiast; 07-06-2019 at 09:33 PM.
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
Old 07-07-2019, 01:38 AM   #21 (permalink)
Senior Member
 
DonJ53's Avatar
 
Join Date: Feb 2017
Posts: 2,267
Points: 121 (+)
Default

Nice job John.

I can see me having to get one now but they still demand plenty of even in poor condition.
DonJ53 is offline   Reply With Quote Quick reply to this message
Old 07-07-2019, 11:29 AM   #22 (permalink)
Senior Member
 
Join Date: Nov 2011
Location: SL
Posts: 197
Points: 3 (+)
Default

Impressive case work and exquisite final result!
jay48 is offline   Reply With Quote Quick reply to this message
Old 07-07-2019, 12:42 PM   #23 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Quote:
Originally Posted by jay48 View Post
Impressive case work and exquisite final result!
Thank you for the kind words.
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
The Following Member Awarded A Point to Vette Enthusiast For This Useful Post:
Old 07-07-2019, 12:47 PM   #24 (permalink)
Senior Member
 
Vette Enthusiast's Avatar
 
Join Date: Feb 2019
Location: NOVA
Posts: 329
Points: 23 (+)
Default

Quote:
Originally Posted by DonJ53 View Post
Nice job John.

I can see me having to get one now but they still demand plenty of even in poor condition.
Don - There was a very nice example of one of these in the black with blue subdial in the trading section a few weeks back. The seller stated the watch was all original and never polished. His asking price was in the low 4 figure range. I gave him an offer, but he had already sold the piece for his asking price within hours of his posting. I managed to find this one from a seller in Australia and picked it up for a bit over half the price of the one I had seen at 4 figures knowing the scope of the work was within my capability. These are expensive pieces but they can be found.
__________________
____________
--John S.--
Vette Enthusiast is offline   Reply With Quote Quick reply to this message
The Following Member Awarded A Point to Vette Enthusiast For This Useful Post:
Old Today, 10:18 PM   #25 (permalink)
Senior Member
 
CombatID's Avatar
 
Join Date: Feb 2017
Location: South Jersey
Posts: 607
Points: 47 (+)
Default

Beautiful!


Sent from my iPhone using Tapatalk
__________________
Collector of Seiko, Citizen, Bulova, Hamilton...
"What do you care about what other people think" - Richard P. Feynman
Philippians 4:8 - Finally, brethren, whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise, dwell on these things.
CombatID is online now   Reply With Quote Quick reply to this message
The Following Member Awarded A Point to CombatID For This Useful Post:
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Seiko & Citizen Watch Forum Japanese Watch Reviews, Discussion & Trading forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 11:06 PM.



Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.