Double Stamp of Calibre Ref

[pip]

On eBay an auction ended this morning for a KS with a heavily patina’d dial that had a double stamping as the movement type. I’ve never seen that before, is it a known thing?


I’ve sat on this for a bit waiting for the auction to end in case anyone was bidding on it. I was tempted to bid out of the novelty value (and the part of my brain that said ‘buy it, it’s worth millions!’ ) but watch funds are low to non-existent.

[cobrajet25]

Not too rare.  Seiko did it with other models.  I guess they were stamped this way when the two models were identical except for the day function.

[Thomas]

I am agreeing with cobrajet25, I have one or two marked like that and I came to the same assumption. 


- Thomas

[tomw86]

It's certainly something I've seen on the 3862/3 quartz movements before. Didn't know that it was known about on automatics too.

[huangcjz]

Yes, it's known - Seiko did it right at the end of the King Seiko production with the -8000 and -8001 models in order to save on costs (as well as I believe having a plain, un-signed crown instead of a KS-signed crown - so I believe that example actually has an incorrect crown for that model!). Hence, I believe that they're worth the same as or less than the -7xxx models. I believe these are the only differences with the -7113 model that preceded them. I don't actually know what the difference between the -8000 and -8001 models is, though. The -8000/1 models are less common than the -711x and -7000 models, but not super rare - not rare enough to make them worth more, I think. They also did it on some calibre 83s with one-piece cases, also in order to save on costs - this example is from 1967:


Here is an example of the 3862/3 that tomw86 mentions with it too, also from 1974, and perhaps co-incidentally, also from factory A (also, co-incidentally, cased in September 1974 like the King Seiko is, too):

[small]

Feb 11, 2020 5:32:20 GMT -8 huangcjz said:

Yes, it's known - Seiko did it right at the end of the King Seiko production with the -8000 and -8001 models in order to save on costs (as well as I believe having a plain, un-signed crown instead of a KS-signed crown - so I believe that example actually has an incorrect crown for that model!). Hence, I believe that they're worth the same as or less than the -7xxx models. I believe these are the only differences with the -7113 model that preceded them. I don't actually know what the difference between the -8000 and -8001 models is, though. The -8000/1 models are less common than the -711x and -7000 models, but not super rare - not rare enough to make them worth more, I think. They also did it on some calibre 83s with one-piece cases, also in order to save on costs - this example is from 1967:

Here is an example of the 3862/3 that tomw86 mentions with it too, also from 1974, and perhaps co-incidentally, also from factory A (also, co-incidentally, cased in September 1974 like the King Seiko is, too):

Good info there, but I think the difference in the last digit of the reference, is the country they were marketed/sold to? "0" world wide "9" North America only "1" Japan or Asia? 

[huangcjz]

Feb 11, 2020 7:25:24 GMT -8 small said:

Feb 11, 2020 5:32:20 GMT -8 huangcjz said:

Yes, it's known - Seiko did it right at the end of the King Seiko production with the -8000 and -8001 models in order to save on costs (as well as I believe having a plain, un-signed crown instead of a KS-signed crown - so I believe that example actually has an incorrect crown for that model!). Hence, I believe that they're worth the same as or less than the -7xxx models. I believe these are the only differences with the -7113 model that preceded them. I don't actually know what the difference between the -8000 and -8001 models is, though. The -8000/1 models are less common than the -711x and -7000 models, but not super rare - not rare enough to make them worth more, I think. They also did it on some calibre 83s with one-piece cases, also in order to save on costs - this example is from 1967:

Here is an example of the 3862/3 that tomw86 mentions with it too, also from 1974, and perhaps co-incidentally, also from factory A (also, co-incidentally, cased in September 1974 like the King Seiko is, too):

Good info there, but I think the difference in the last digit of the reference, is the country they were marketed/sold to? "0" world wide "9" North America only "1" Japan or Asia? 

Perhaps - I know that that is the case for some other models - but I don't think so in this case, since King Seikos were not sold outside of Japan - non-KS-badged Chronometers were sold overseas instead. Hence the -7113 is a later model than the -7111, which is later than the -7110 (the case construction and hence case-back was different between the -7110 and -7111, but it's not clear what the difference between the -7111 and -7113 is, apart from perhaps their crowns), and I believe the -8001 is later than the -8000. What you say is somewhat the case for the Chronometers, though, e.g. the -7090 case with a horseshoe case-back was for international markets, and was replaced by the -7091 with the later straight-text case-back, except for North America, where there was the -7099 instead of the -7090.

[small]

Feb 11, 2020 8:04:13 GMT -8 huangcjz said:

Feb 11, 2020 7:25:24 GMT -8 small said:

Good info there, but I think the difference in the last digit of the reference, is the country they were marketed/sold to? "0" world wide "9" North America only "1" Japan or Asia? 

Perhaps - I know that that is the case for some other models - but I don't think so in this case, since King Seikos were not sold outside of Japan - non-KS-badged Chronometers were sold overseas instead. Hence the -7113 is a later model than the -7111, which is later than the -7110 (the case construction and hence case-back was different between the -7110 and -7111, but it's not clear what the difference between the -7111 and -7113 is, apart from perhaps their crowns), and I believe the -8001 is later than the -8000. What you say is somewhat the case for the Chronometers, though, e.g. the -7090 case with a horseshoe case-back was for international markets, and was replaced by the -7091 with the later straight-text case-back, except for North America, where there was the -7099 instead of the -7090.

Ah the consistency of Seiko.

[tempelkim]

Feb 11, 2020 5:32:20 GMT -8 huangcjz said:

They also did it on some calibre 83s with one-piece cases, also in order to save on costs - this example is from 1967:

Same here. It's a Business-A 8306-8020 from July '67, labeled as 8306/46...