Post by razvanjbl on May 12, 2019 19:08:53 GMT -8
0634-5009 but as of today its video has been watched by 1000 viewers. Not a big achievement but a reason to celebrate and post the video and some background information about the Seiko 0634 caliber.
The 0634 caliber was Seiko's first digital chronograph watch and was engineered and produced by the Suwa Seikosha Co. It was released in three different case numbers, 5000 (1975) / 5001 (1976), 5009 and 5019 (both 1975 or 1976). There is no visual difference between case number 5000 and 5001. Two different module revisions were used, 0634A and 0634B.
During the production run of the 0634-5000/5001 various bracelets were used (XAB890, XBB010, XAB990 and XQB380) and in one of the Seiko catalogs (1975-2, p. 35) it is even pictured with a bracelet that I've never seen on this watch. The bracelets of the cases 5009 (B223, B223S) and 5019 (B228) have always been the same but with minor changes.
Over the years there were some minor variations of the dial printing and the inner construction has been slightly changed. Some even look like prototypes on the inside. This probably shows that Seiko was gaining its first experiences in the mass production of digital watches.
In my opinion it's not easy to find detailed information about Seiko's early digital watches. All the above information is the result of me collecting them. So if you know more or better then please let me know.
Very nice collection and extremely well presented information on the website! So structured and well documented! Congrats!
These are my two 0634 and I am about to receive my 5009 in a week or so (basically your picture with these three lined up convinced me I must have them 😃) Will post a pic with all three later
I love the chunky cases and bracelets are amazing! BTW I am searching and extra link for my 5019 ...