UG 22492 Pin Pusher preservation

Back from services, ready for some quality wrist-time. Happily reflecting over 80 years of history. Still trying to get to the bottom of the family legacy. Apparently my great great uncle may not have been the original owner before its long stretch in a jewelry box- this could have been one of the few items surrendered to him during his 1945 service in Germany.

Hope to learn more about this reference or related models - I gather it’s a limited piece based on some breadcrumbs in other threads. UG said they’d be happy to offer the servicing starting at four figures; I’ve yet to hear back from their heritage team, and they said archival research is on hold amidst the relaunch.
Many thanks for all the recommendations and information, ideally I can return with less hasty photos that better demonstrate how the light plays on the patina. Lume matched nicely too. Catchy at a distance and a bit distressed up-close. Not too married to the provided strap.

Thank you. Do you have a guess as to figures produced or known?
Those photos are now post-service. It was a couple hundred more than that, including matching the minute hand lume to the original hour hand and tightening up the lug hole damage. Pleased with the results, just like the fine advice I’d got here.

Very interesting to read, the watch is beautiful and that strap fits it very well!