The Dive Watch Connection

Not sure if the UDT was ever an actual 'issue' watch of any military services/units as some write ups have claimed. I don't know much about these watches or if they were issued by the military, but there's a report by Navy Experimental Diving Unit, testing some digital watches (some Seikos, Casios ...

Hello, I like those watches a lot. The first digit on your caseback is the 9. This model line was produced from mid 80's. From '99 there has been a re-issue of this model. So your watch must be from '89. The second digit is a zero or O. The O is for October. Therefore October 1989 should be the prod...