Seiko Watch Production Date Calculator is ALIVE again - Page 4 - Seiko & Citizen Watch Forum Japanese Watch Reviews, Discussion & Trading
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Old 01-26-2016, 02:24 PM   #76 (permalink)
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Quote:
Originally Posted by JEson1984 View Post
Just thought that you should know, ...The link is no longer active. I am wondering if/when do you think that the link will be updated?
I was thinking the same myself!
Any news on this? Is it a hosting issue?

Thanks,
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Old 02-05-2016, 01:43 AM   #77 (permalink)
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Not Found

The requested URL /~jgauch/photos/seiko/ was not found on this server.
Apache/2.4.7 (Ubuntu) Server at turing.csce.uark.edu Port 80

As of 2/5/16
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Old 02-15-2016, 08:07 AM   #78 (permalink)
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^^^ I get the same message. 2-15-16.
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Some of those, a few of these and a couple of the others.
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Old 04-01-2016, 01:03 PM   #79 (permalink)
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Would be nice to get this up and running again. I found another source by Googling - Seiko Watch Production Date Calculator. I don't necessarily want to promote another venue, but if you need it.

I am only bringing this up because I care and this forum is the first watch forum I joined back in 2006
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Old 04-08-2016, 11:12 AM   #80 (permalink)
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when i'm in a hurry, just a glance at the 1st two digits of the serial number is enough.. year and month that is..
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Old 04-08-2016, 11:52 AM   #81 (permalink)
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all well and good as long as you know the decade the watch was produced in, this is not always straightforward.
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Old 06-10-2016, 10:49 AM   #82 (permalink)
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Thank you! But the link was lost.
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Old 08-01-2016, 07:50 AM   #83 (permalink)
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Thank a lot.
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Old 02-01-2017, 07:56 PM   #84 (permalink)
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Default J date code?

Hello All,

I am searching for a birth month Seiko: Dec 1963 = 3Dxxx as I understand it.

Some of the 1960's watches have a J at the start of what appears to be the serial number. Some with an L also.

Here is one example taken from the bay.

Can someone tell me how that works in the date code?

Thanks,
Attached Images
File Type: jpg J date.jpg (164.4 KB, 79 views)
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Old 02-02-2017, 06:39 PM   #85 (permalink)
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This works, retroseiko.co.uk
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Old 07-10-2018, 09:37 PM   #86 (permalink)
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Thank you! Very helpful!
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Old 07-10-2018, 09:57 PM   #87 (permalink)
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This kinda shows seiko's weakness with its tracking numbers/process.
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Old 02-20-2019, 12:55 AM   #88 (permalink)
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Default Seiko Watch Production Date Calculator is ALIVE again

The calculator doesnt give me the correct date.
I have a sumo SDBC031 with date code


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Old 04-05-2019, 04:17 AM   #89 (permalink)
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I love this program! It's really helpful at buy&sell!
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Old 06-08-2019, 02:11 PM   #90 (permalink)
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The decade unknown is a bit of a pain. Ive been looking everywhere to get a better idea of getting a watch age. Im trying to get my prospective son-in-laws into Seikos so plan to buy each a Diver. Looking at SKXs but cant check with complete confidence that Im buying a 1997, 2007 (or even a 2017) with the 7S26 0020 reference.

Any ideas?


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Old 06-08-2019, 02:17 PM   #91 (permalink)
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Just thinking with multiple decade production on some models, is there a chance there would be two 10-year separated, identical watches with the same serial numbers floating around?


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Old 06-08-2019, 02:55 PM   #92 (permalink)
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Yes, I believe there might be two watches with the same serial number.
However, I think Seiko releases timely revisions of their movements (e. g. 7S26A vs. B), so you can distinguish them by opening the watch.
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Old 06-11-2019, 06:04 PM   #93 (permalink)
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Quote:
Originally Posted by Mr.Jones View Post
Yes, I believe there might be two watches with the same serial number.
However, I think Seiko releases timely revisions of their movements (e. g. 7S26A vs. B), so you can distinguish them by opening the watch.


Thanks,

Is there a table somewhere that gives the Year intervals for 7S26As Bs etc.



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Old 06-29-2019, 11:34 AM   #94 (permalink)
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I'm a software engineer and Seiko collector and am happy to help with technical issues or provide hosting. Let me know if you'd like any help

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Old 07-03-2019, 04:59 AM   #95 (permalink)
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Quote:
Originally Posted by Socks View Post
Thanks,

Is there a table somewhere that gives the Year intervals for 7S26As Bs etc.



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Although my automated tool doesnt actually use them (people dont normally want to open the case to get the revision), my database does include some revision data :-

http://retroseiko.co.uk/seiko-serial-database.htm

7S26a was made from 1996 until 2006
7S26b was made from 2006 until unknown
7S26c was made from 2011 until unknown

I cannot guarantee its accuracy, I dont check it as thoroughly as I do the main movement number data and it only really has revision data for the 7S26 and 6217 so far. If anybody does find more data on other movement revisions I will happily add it in.
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