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If anyone in the world knew about it, the author of the website http://af0210strap.com
would have known and published the information.
that is because he’s a vintage military watch enthusiast and a member of the Military Watch Ressource forum where he would have found all of the available info as it is the forum where top experts and most knowledgeable enthusiasts have been congregating and discussing vintage military watches for over 20 years.
For example MWR is the community where the Bulova UDT prototype was first discovered, discussed and identified.
Is is a shame nobody seems to know hopefully one day we will.
Cheers
Come to think of it, it’s possible some info was shared in some old threads - so maybe it’s worth asking there?