This is a gen I got awhile back.. had sometime on Sunday morning... took some closeup shots... I think the case is some brass alloy... developed a real nice patina..
Source is Blancpain.... I track this down from an old listing at Chronotrader.... issued to the German Army in the 70s...
Strap is by Wotancraft... 20mm leather Nato for rolex...
Thanks all for the comments...... The TR-900 is my next grail.... if I can find one...
I rather not say the price of this piece........ but the offer was too good to pass by........