5126-8100 - Seiko & Citizen Watch Forum Japanese Watch Reviews, Discussion & Trading
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Old 03-23-2019, 02:30 PM   #1 (permalink)
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Default 5126-8100

Before,

DSCN0683.JPG DSCN0688.JPG

After...wait for it.

Never tackled one of these,

DSCN0702.JPG DSCN0698.JPG

Q: What does the arrowed adjuster do.

Last edited by DonJ53; 03-23-2019 at 02:34 PM.
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Old 03-23-2019, 03:10 PM   #2 (permalink)
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Well I could be wrong but that screw is a counter clockwise thread given the 3 slots, and so turning it counter as directed by the arrow, I believe will wind the movement manually.
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Old 03-23-2019, 03:34 PM   #3 (permalink)
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Thanks, I should have noted the 3 slot (left thread) feature.
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Old 03-24-2019, 05:08 AM   #4 (permalink)
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DSCN0778.JPG
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Old 03-24-2019, 09:38 AM   #5 (permalink)
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Did you pick this watch up on eBay? Looks exactly like the one I bid on from a UK seller a week or so ago and lost out. Appeared to have great dial and hands. Good luck with the restoration. Nice pickup.

Note - The crystal in that watch is the same one used on the 6105-8000. 320W10GN00. I figured based on date the watch was mfg, the crystal would be a higher dome type 1. Spencer Klein has them if interested.

https://www.kleinvintagewatchrepair.com/shop
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Old 03-24-2019, 12:41 PM   #6 (permalink)
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Quote:
Originally Posted by Vette Enthusiast View Post
Did you pick this watch up on eBay? Looks exactly like the one I bid on from a UK seller a week or so ago and lost out. Appeared to have great dial and hands. Good luck with the restoration. Nice pickup.

Note - The crystal in that watch is the same one used on the 6105-8000. 320W10GN00. I figured based on date the watch was mfg, the crystal would be a higher dome type 1. Spencer Klein has them if interested.

https://www.kleinvintagewatchrepair.com/shop
Yes, twas me.

The crystal is not very high, 1mm from edges. Plus it does not have the very slight upward thrust at its extremity (30mm) thus making it easier to attempt lapping.

If you look at Spencers web there are 4 types of 320W10GN00.

I plan on diamond lapping with a tubular brass lap...more later once I have drawn it.

The hands will just need polishing.

Surprisingly its running at about +8s/d.

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Old 03-24-2019, 03:27 PM   #7 (permalink)
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Quote:
Originally Posted by DonJ53 View Post
Yes, twas me.

The crystal is not very high, 1mm from edges. Plus it does not have the very slight upward thrust at its extremity (30mm) thus making it easier to attempt lapping.

If you look at Spencers web there are 4 types of 320W10GN00.

I plan on diamond lapping with a tubular brass lap...more later once I have drawn it.

The hands will just need polishing.

Surprisingly its running at about +8s/d.
You will have to provide some photos of how you go about polishing these crystals. Very interested to know how it is done.
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Old 03-24-2019, 04:50 PM   #8 (permalink)
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In a previous life I worked on spherical items that were hard anodised. The spherical surfaces had O ring seals running on them so they were polished after the HA treatment.

To polish a spherical surface required a tubular tool with a negative taper inside the end. The negative tapers surface being tangential to the spherical surface. Fine grades of carbide W&D paper where placed between the tool and HA surface as the polishing medium.

I intend using this principle but using a brass lap with diamond paste as the cutting medium. The diamonds should impregnate the brass to create the 'cutter'.
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Old 03-26-2019, 12:16 PM   #9 (permalink)
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Lovely dial under that crystal Don
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Old 03-26-2019, 12:49 PM   #10 (permalink)
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Yes, nay bad, the hands require polishing.

Brass lap with tangential surfaces on the ends. One end for course diamond paste the other fine.

6105CrystalLap.jpg
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Old 04-11-2019, 01:23 AM   #11 (permalink)
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Update: Disassembly has commenced.

DSCN0671.JPG

Diamond lapping paste.

DSCN0674.JPG

Tools, modified brass nut and wood clamp.

DSCN0677.JPG

I will need to source a new gasket.

DSCN0678.JPG DSCN0679.JPG DSCN0680.JPG

Finish lapped domed crystal

Before and after, yes it is the same one.

DSCN0683.JPG DSCN0682.JPG

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Old 04-11-2019, 03:01 AM   #12 (permalink)
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Update: Disassembly has commenced.





Having typed that is like knowing there is a strip show happening somewhere with no photos.....
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Old 04-11-2019, 04:16 AM   #13 (permalink)
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Dang, Don - your polishing is on point! I'd love to know how you do it, as I have two SBPP001 Power Design Project chronos with scratched thick domed crystals that are no longer available...
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Old 04-11-2019, 05:51 AM   #14 (permalink)
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Crikey! Seconding Jonas request for more details... Ive just read the thread a few times and cant quite picture what youre doing. Im almost there, just need a nudge I reckon.


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Old 04-11-2019, 05:56 AM   #15 (permalink)
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Dang, Don - your polishing is on point! I'd love to know how you do it, as I have two SBPP001 Power Design Project chronos with scratched thick domed crystals that are no longer available...
It's only possible to reclaim domed crystals that don't have the upturned lip at the extremity. Some 6105 glasses do, some don't. I think Spencer K shows all versions on his web. This 5126 has no upturn.

The items used are shown in the pics. The crystal is placed into the wood jig, which in turn is clamped into a vice. Using the slightly modified brass nut, and the various grades of diamond paste 40, 28, 20 and lap the crystal. The diamond paste impregnates the brass because it's softer than glass and thence it cuts the glass. I finished off with the Cerium Oxide paste on pads as per the flat crystals shown elsewhere.

This glass had some deep scratches and it took about 4 hours elbow grease to complete...while listening to Stella Street videos...so plenty of laughing non the less.
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Old 04-11-2019, 06:54 AM   #16 (permalink)
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Ah, I think I can grasp it now you explained a bit more. This only leaves me to find a suitable brass nut AND shape it to fit the dome of the crystal... Then build a wood jig to hold it and a weekend to polish...

...or didn't you fit one side of the nut to the crystal? I thought the "tangential" referred to tapered edges on the nut...
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Old 04-11-2019, 07:41 AM   #17 (permalink)
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Quote:
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Ah, I think I can grasp it now you explained a bit more. This only leaves me to find a suitable brass nut AND shape it to fit the dome of the crystal... Then build a wood jig to hold it and a weekend to polish...

...or didn't you fit one side of the nut to the crystal? I thought the "tangential" referred to tapered edges on the nut...
Yes, using a tap (to match thread in nut) held in a pistol drill chuck, screw the brass nut on and while spinning it form a shallow taper in the end using a hardened steel scraper. It only needs to be an approximate taper because the lapping process does wear it down to fully form the concave surface to match the crystal.
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Old 04-11-2019, 07:58 AM   #18 (permalink)
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I guess I could do that on my mini lathe by turning the headstock...
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Old 04-11-2019, 01:03 PM   #19 (permalink)
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I thought that 6309/6106/6119 were good training grounds for most vintage. This movement is something else as it must have thrice the number of parts which are a step above in their quality of manufacture. It's taken me all day to U/S clean.

I must have taken 100 pics so here's a few only

DSCN0643.JPG DSCN0652.JPG DSCN0657.JPG

DSCN0661.JPG DSCN0666.JPG DSCN0676.JPG

DSCN0685.JPG DSCN0726.JPG DSCN0704.JPG

DSCN0705.JPG

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Old 04-11-2019, 08:18 PM   #20 (permalink)
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Wow. The cal 5126 looks to be an extremely robust movement. Beautiful work as usual. Can't wait to see the finished product.
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Old 04-12-2019, 01:27 PM   #21 (permalink)
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Thanks for sharing.

Do you have any tricks for polishing the hands and case?

Rodney
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Old 04-12-2019, 01:45 PM   #22 (permalink)
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Quote:
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Thanks for sharing.

Do you have any tricks for polishing the hands and case?

Rodney
Hands: I place a silver or rouge cloth onto my flat work surface. Hands are placed face down, mount hole nearest me, onto the cloth and then using forefinger press down hard and drag the hand across the cloth toward me. I normally repeat this until the chrome shines. Seems to have worked well on all hands to date.

Case: I do sympathetic restoration only so no case work other than remove burrs from the spring pin holes.
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Old 04-12-2019, 09:08 PM   #23 (permalink)
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Very fine work! I can't wait to see your completed watch.
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Old 04-13-2019, 01:06 AM   #24 (permalink)
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During disassembly it was clear that I am not the first visitor to the movement. The parts were very clean and there was absolutely no signs of oil, old or new. Some screw heads show use.

I started assembly yesterday, with no worksheets to follow, so I am lubricating parts that I consider necessary and similar to other movements in the Seiko range.

I have sourced a crystal gasket which, although 3rd party, I hope suits this case.
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Old 04-13-2019, 04:08 AM   #25 (permalink)
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Diamond lapping paste.

Finish lapped domed crystal

Before and after, yes it is the same one.

Attachment 407935 Attachment 407933[/QUOTE]

Very fine polishing, my compliments
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