Any idea of the actual production run years for each jewel count.
I've been told the the 27J run was up to 1971 - is that correct?
Thanks,, Mike
Hi John,
Just wondering as I notice on the bay that sellers tend to describe the 27J as "much rarer" etc.
Thanks,, Mike
I have a 4006-6020 27 Jewels from January 1970Can anyone clarify regarding the 4006-6020 as to wether it was produced as a 27jewel and 17jewel? as my 6020 is a 27 jewel and my other 6021's are 17 jewel. I have been informed that they are called 6020/6021 because the large or small stem tube is this correct or does the 6020 relate to the 27j and the 6021 relate to the 17 j?
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Beautiful collection,would love one of the rare models like your 4005.My collection this is my lot 2x 4005 and 1x 27j and 2x 17j 6021 one of which I have swapped out the original black enamel bezel for the blue, just something different
Yes actually saw that one myself,Including the two already mentioned above I have seen four Diashock this year. Both had also no mention of Diashock.Oddly enough, I saw another december 66 diashock for sale just recently on the usual place. Its in a bit better condition but no bargain at USD1000. I'm not sure the owner knew how rare it is, it was just listed as seiko 4006 7000.
Thanks so much for this quick history... is it hard to get one 67' Jan? what model reference should I be looking for? and is it hard to get?Ok, here is something
The Bell-Matic was introduced as 4006-7000 model in November 1966 in Japan and at that time was the world's first alarm wristwatch with a CENTRAL ROTOR automatic.
November 66 specimens are characterized by their 'dolphin' caseback and a notch in the case for the alarm button.
In mid 1967, a special Bell-Matic model was introduced in Seiko's 'Business' watch line, aka the business bell, which was however discontinued again after a few months of production.
Due to import tarrifs in the US, the high jewel count of the original 4006A design (27J) was a drawback for exporting to the US.
Thus a special calibre 4006A variant with 21J was produced in two case variants (7019 and 7029) specifically for the north american market.
A date-only Bell-Matic (calibre 4005A) was introduced in mid 68 and remained in production for approx. 1 year.
In mid 1969, a 17J derivative of calibre 4006A was introduced, which was used in almost all Bell-Matic models produced afterwards, with the main exception of the 7011/7012 models, which were most probably JDMs.
The Bell-Matic line was discontinued altogether in 1978, but it should be noted that in very rare occasions, some cases from 1979 can be found (which however are believed to be 'repair cases' i. e., they did not leave the factory as a complete watch).
Best,
Hermann
Hermann... Happy New Year to you.... can you please tell me what model reference of the Bellmatic I should be looking for ... I want to source a 1967 January Bellmatic ( or any Bellmatic )... my birth year and birth month watchOk, here is something
The Bell-Matic was introduced as 4006-7000 model in November 1966 in Japan and at that time was the world's first alarm wristwatch with a CENTRAL ROTOR automatic.
November 66 specimens are characterized by their 'dolphin' caseback and a notch in the case for the alarm button.
In mid 1967, a special Bell-Matic model was introduced in Seiko's 'Business' watch line, aka the business bell, which was however discontinued again after a few months of production.
Due to import tarrifs in the US, the high jewel count of the original 4006A design (27J) was a drawback for exporting to the US.
Thus a special calibre 4006A variant with 21J was produced in two case variants (7019 and 7029) specifically for the north american market.
A date-only Bell-Matic (calibre 4005A) was introduced in mid 68 and remained in production for approx. 1 year.
In mid 1969, a 17J derivative of calibre 4006A was introduced, which was used in almost all Bell-Matic models produced afterwards, with the main exception of the 7011/7012 models, which were most probably JDMs.
The Bell-Matic line was discontinued altogether in 1978, but it should be noted that in very rare occasions, some cases from 1979 can be found (which however are believed to be 'repair cases' i. e., they did not leave the factory as a complete watch).
Best,
Hermann