Sweet. That's easily one of the best preserved examples I've ever seen! Lots of old Speedmasters are pretty cruddy by now.
Any other details about it? Not to argue, but I would wager the inside of the case-back is marked reference 145.012 - 67, indicating it was cased and shipped from the manufacturer in '67. If so, then it's a Caliber 321 watch.
It's a stunner! Thank you for sharing it with us
