Thought I got a steal on eBay with this one, but it didn't quite turn out that way. The case looks to be dated M6 (1966) while the movement seems to be dated M8 (1968). It is a 12EBACD 30 jewel mirco-rotor movement which is the real reason I've been on the hunt for one of these. I love watches with interesting movement technology, and a micro-rotor was something my collection was missing. Case is stainless steel in a monobloc (one-piece) design. Dial isn't perfect, but I tend to like that more than a pristine dial. Case measures just about exactly 35mm from side to side, and has a 20mm lug width. I sent this one into Budget Accutron Service because of the recommendation on this site, and because I wanted this watch to be very well taken care of, and I'm overall happy with my experience. Watch seems to be running very well and the date function is working nicely again. They were able to get me the photos of the inside of the watch to post here, as I (still) don't have the tools or experience to open a monobloc case. I'll leave the model up to you all. I've definitely seen this model before, but can't seem to find a match in the model or advert database, but perhaps I'm not looking well enough. Thanks!
Nice watch, we have a similar one here. previously identified as an Ambassador, generic, likely of European origin based on case markings.
1968 Ambassador
