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My 6139-7002 just came back from depot level maintenance. Acquired in Singapore on first deployment 1982. 140 Singapore dollars. Think that was about $75 USD at the time. It has been inop for over 25 years. That is an original repair coupon, not honored by Seiko USA. Cost about as much as the watch is worth to repair. But it has sentimental value. Wore it for many years, long after I got off active duty. Now if I can just figure out how to remove a link from the bracelet. Hard to believe my wrist is smaller than when I was 26 years old.