Seiko used a different model numbering system prior to the cal followed by case/region format. I don't know if there is any overlap between the two formats.
What have I here? A 6206A marked "J13080 MAW"?
Today I picked up this most interesting Weekdater. The outside of the etched Dolphin case back is marked "J13080". Inside the case is engraved "J13080 MAW" Upon opening it reveals a 6206A, 26J movement at 19,800 bph.
To my great surprise, it is 'gold tone' in color. Not sure if that's copper or some thin EP plating. Anyway it's my first gold tone movement since I sold my old Bulova Super Seville years ago.
I found this very informative thread here on SCWF about the 6206A/B movements:
http://www.thewatchsite.com/21-japa...06-caliber-1960s-workhorse-seiko-classic.html
So, can anyone explain why the case back is numbered J13080 and not "6206-8990" (or similar)? The inside is engraved 52XXXXX so it's from Feb. 1965. The thread above suggests that the 6206B came about in Feb 1965 so this makes a lot of sense.
Here are some photos. I'll be in the market for a new dial, this is way too much WABI for me !
To my great surprise, it is 'gold tone' in color. Not sure if that's copper or some thin EP plating. Anyway it's my first gold tone movement since I sold my old Bulova Super Seville years ago.
I found this very informative thread here on SCWF about the 6206A/B movements:
http://www.thewatchsite.com/21-japa...06-caliber-1960s-workhorse-seiko-classic.html
So, can anyone explain why the case back is numbered J13080 and not "6206-8990" (or similar)? The inside is engraved 52XXXXX so it's from Feb. 1965. The thread above suggests that the 6206B came about in Feb 1965 so this makes a lot of sense.
Here are some photos. I'll be in the market for a new dial, this is way too much WABI for me !
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