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Discussion Starter #1 (Edited)
Edit: Thread title obviously incorrect.Should read 6309-7049!

Hi guys

New to the world of Horology and new to the site so first post from me..

Upon a recent house move my father discovered and gave me a few watches he had stored away for 20+ years.A couple of them are vintage Seiko and one of them is the 6309 7409 divers watch (the other is the 6139 6000 'waterproof'). I have given it a light surface clean and it has scrubbed up beautifully!

Having done some research on it I think it's all original. The bezel rotates both ways, the 'dot' in the triangle on the bezel looks the right size, the hands look sharp and having studied the strap that is an original GL 831 (can just make out the etching) I am unsure about the glass as my father cannot confirm if he changed it or not.

I ask your help in confirming it's originality and for some advice on what to do with it as I am planning on keeping it for the foreseeable future as it looks so good!

Should I get it serviced as it seems to be working ok? Should I get it professionally cleaned/polished? Will it make a difference? The minute hand of the watch and the seconds hand that goes round has a couple of very, very light signs of corrosion/discolouration. Is this evidence that liquid may have got inside or just signs of it's age? The glass has a couple of light scratches as expected but I just cannot confirm if it's original! Please see attached pictures. I am planning on replacing the strap as well as I know how rare it is.

Apologies for all the questions but thanking you in advance for any help.

Andy

(Will be posting a thread and questions on the 6139-6000 'waterproof' I mentioned soon!)
 

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Hi and welcome :)

No expert but from what i can see in the pictures it looks pretty good :)

The correct thing to do would be to have it serviced but if its running ok..............

At the very least change all the gaskets and clean the case (under the bezel etc) but don't refinish the case.

You could perhaps drop the strap in boiling water to clean and then a little olive oil rubbed into it ?

Whats happened to the case back ?
 

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Hi and thanks for your warm welcome :)

Yes the caseback seems to be the only issue. I'm not sure what happened to it but it's clearly very scratched. I can make out most of the details apart from most of the serial number which is a shame as I would be interested in the date of manufacture..
 

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Hi and welcome :)

No expert but from what i can see in the pictures it looks pretty good :)

The correct thing to do would be to have it serviced but if its running ok..............

At the very least change all the gaskets and clean the case (under the bezel etc) but don't refinish the case.

You could perhaps drop the strap in boiling water to clean and then a little olive oil rubbed into it ?

Whats happened to the case back ?


Yes I was considering dropping it in the boiling water but only to reshape one half of the strap as it's a little warped.Will this be ok?

I will also need to find a specialist as the couple of jewellers I went into didn't have a clue about the watch so not sure I trust them to care for it properly!
 

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Discussion Starter #7
Thanks..Just curious how much of an effect does the scratched back have on value?

Will try and get the 6139 pictures up this evening
 

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Thanks..Just curious how much of an effect does the scratched back have on value?

Will try and get the 6139 pictures up this evening
Funny i was thinking that as well :) doesent affect the watch etc but for me it would be a PITA so much so that i would change the back for a spare good one :).

Value wise is hard to say as a buyer could just not take it into consideration it is just some of the "anal" collectors you come across who would want to knock the value down because of it by say 10/20% (jmo).
 

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Hi Andy and welcome. Looks like a very nice 6309-7049 in original condition. I would have it serviced even if it's running fine just to avoid any damage due to a dry movement. Have the gaskets replaced and enjoy the watch for what it is.

Cannop (fellow member here) aka Duncan in the UK kindly has serviced a couple of Seikos for me in the past and I cannot recommend him enough. But there are also many others in the UK who would be able to take care of your Seiko.
 

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Funny i was thinking that as well :) doesent affect the watch etc but for me it would be a PITA so much so that i would change the back for a spare good one :).

Value wise is hard to say as a buyer could just not take it into consideration it is just some of the "anal" collectors you come across who would want to knock the value down because of it by say 10/20% (jmo).
Haha yes it's a bit of a pain at the moment but would be even more so if I replaced it as I know it wouldn't be the original!

Doesn't make a difference at the moment anyway as I am planning on keeping it and I suppose I could look at the scratches as the experience my dad had in it :)
 

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Discussion Starter #11 (Edited)
Hi Andy and welcome. Looks like a very nice 6309-7049 in original condition. I would have it serviced even if it's running fine just to avoid any damage due to a dry movement. Have the gaskets replaced and enjoy the watch for what it is.

Cannop (fellow member here) aka Duncan in the UK kindly has serviced a couple of Seikos for me in the past and I cannot recommend him enough. But there are also many others in the UK who would be able to take care of your Seiko.
Thanks Mario, I was thinking the exact same as it more than likely has dried out inside. I will probably leave it until it has been looked at properly. I will look into local seiko specialists and may make contact with Cannop.Thanks for the recommendation.

Do you have any observations on if the glass is original or not?
 

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Thanks Mario, I was thinking the exact same as it more than likely has dried out inside. I will probably leave it until it has been looked at properly. I will look into local seiko specialists and may make contact with Cannop.Thanks for the recommendation.

Do you have any observations on if the glass is original or not?
Pretty impossible to tell from your pictures (imo).
 

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Hello and welcome!

First off, you have a very nice Seiko 6309 Diver there - congrats on a very nice start to a Seiko collection. As Tiger and others have written, if this were my watch I would certainly wear it for a week and see how it is keeping time. I would then locate someone to service it (this Forum is a valuable source of information) and I would indeed have the movement serviced and the gaskets changed. Regarding the case back, while I don't think you are looking to sell this watch, I would nonetheless expect to not fetch "top dollar" for this watch based on the case back. I myself would take very good photos of it and document the serial number and not think again about the condition of the case back. The serial number will give you the production date of this 6309. The first number is the Year of production, the second number the Month of production. So a serial number starting with "85xxxxx" would indicate the watch was made in May (5) of 1978 (8). Here is a link to a very informative Seiko diver watch guide: https://archives.makedostudio.com/seiko-divers/index.html

Regarding the original crystal, I wouldn't worry too much about that if I were you, it is understood these things get scratched and replaced. The bezel insert, dial, and hands are the important things that need to be original.

Yeah, let's see that 6139 now!

Enjoy that beautiful diver!

Dan
 

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Hello and welcome!

First off, you have a very nice Seiko 6309 Diver there - congrats on a very nice start to a Seiko collection. As Tiger and others have written, if this were my watch I would certainly wear it for a week and see how it is keeping time. I would then locate someone to service it (this Forum is a valuable source of information) and I would indeed have the movement serviced and the gaskets changed. Regarding the case back, while I don't think you are looking to sell this watch, I would nonetheless expect to not fetch "top dollar" for this watch based on the case back. I myself would take very good photos of it and document the serial number and not think again about the condition of the case back. The serial number will give you the production date of this 6309. The first number is the Year of production, the second number the Month of production. So a serial number starting with "85xxxxx" would indicate the watch was made in May (5) of 1978 (8). Here is a link to a very informative Seiko diver watch guide: https://archives.makedostudio.com/seiko-divers/index.html

Regarding the original crystal, I wouldn't worry too much about that if I were you, it is understood these things get scratched and replaced. The bezel insert, dial, and hands are the important things that need to be original.

Yeah, let's see that 6139 now!

Enjoy that beautiful diver!

Dan

Hi Dan, thanks for the message..

I'm into the second day of wearing it and the time seems to be keeping well BUT it has stopped on me on a couple of occasions. Before wearing it I gave it a shake for about 20 seconds and actively kept it moving for a while. Is there another way of generating enough power to keep it running for longer or could this be a sign that it may indeed need that service?

Re the caseback I have looked at it through a magnifier it and have worked out a couple numbers but it's impossible to determine if they are the first or second digits :( Thank you for the link though I will certainly have a read up of that!

I will also try and get a clearer picture of the glass on so that I may get a definitive answer on if that's original..

6139 thread up shortly :)
 

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You could take the case back off and give the barrel mainspring a full wind manually ? :)

The only way to really know if the crystal is original or not is to take it out of the watch and check the chamfer (imo).
 

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You could take the case back off and give the barrel mainspring a full wind manually ? :)

The only way to really know if the crystal is original or not is to take it out of the watch and check the chamfer (imo).
I wouldn't have a clue how to do that at the moment so I will seek advice on that one!

I have also just created my 6139 thread..
 

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Hi Dan, thanks for the message..

I'm into the second day of wearing it and the time seems to be keeping well BUT it has stopped on me on a couple of occasions. Before wearing it I gave it a shake for about 20 seconds and actively kept it moving for a while. Is there another way of generating enough power to keep it running for longer or could this be a sign that it may indeed need that service?

Re the caseback I have looked at it through a magnifier it and have worked out a couple numbers but it's impossible to determine if they are the first or second digits :( Thank you for the link though I will certainly have a read up of that!

I will also try and get a clearer picture of the glass on so that I may get a definitive answer on if that's original..

6139 thread up shortly :)
Yes, it certainly will benefit from a service. The fact that it is running even intermittently reinforces the perception that Seiko makes good watches. Looking on the case back I can see the words "Japan A". This helps date the watch to the earlier production numbers, Seiko later removed the "Japan" and just had the A. I think the watches were later made/assembled outside of Japan.

Regarding the crystal, I stand by my previous statements that original crystals are not so critical in the grand scheme of things Seiko.

Take care of both these watches!

D.
 

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Yes, it certainly will benefit from a service. The fact that it is running even intermittently reinforces the perception that Seiko makes good watches. Looking on the case back I can see the words "Japan A". This helps date the watch to the earlier production numbers, Seiko later removed the "Japan" and just had the A. I think the watches were later made/assembled outside of Japan.

Regarding the crystal, I stand by my previous statements that original crystals are not so critical in the grand scheme of things Seiko.

Take care of both these watches!

D.
Will definitely get it looked at in the near future. Yes I read up a bit on the Japan A which helps as I believe it switched to just japan around 1980.

I will also take your advice and try not to get too hung up about the crystal as it's in great condidtion in both watches and I'm fairly confident they are original.

Thanks for your help and don't worry I will take great care of them :)
 
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