1969 Pre-moon 861 with 1171 bracelet. Incorrect end links of course. Case measures out at 42.2mm, no grinding away the pusher side to try to make an asymmetrical case symmetrical. Those with a Speedie eye for detail have at it:
Edit, speaking as a noobie:-- Hour markers seem shorter. Nice DON bezel. Nice acquisition. Certainly a watch you can enjoy!