Jay (Eire)
12361
Wasn't there some indication (small engraving) over the production year on the scale at the back of the watch so that you know when a battery change was due? [nt]
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Information on old Seiko tuna
I have had this old watch for years. It was given to me by a patient. Any information regarding age and where I can have it serviced properly would be appreciated. Thank you in advance for your consideration and recommendations, best, Tony ...
https://www.seikoserviceusa.com/
I had one of those a long time ago. Cool watch. Best, Martin
About 30 years old
You can go to a couple sites ( Here is one ) and type in your numbers (shown here) and it will calculate a date. Since your case has a scale for marking the replacement of the battery, it helps us a little. The first digit of the serial number indicates t...
Most Likely you watch is from 1988.
The first of the Tunas to feature this classic design. Featured in the James Bond 007 movie 'For Your Eyes Only' in 1981. Model 7549-7000.Similar to the 7000, The 7549-7009 but built for the international market. Differences include the 'Battery Change Ri...