case is marked M5 But I think it is a 66 Calandar watch? I still have not found a face like this one either. If you know what it is, please let me know. It was my fathers, and I still have the box, all it says is automatic.
In reply to Hi Terry, this looks to me by Reverend Rob
Hello Terry - welcome to myBulova. I think you're fortunate to have your fathers watch. These watches are called Accutron. Bulova pioneered 'electric' watches in the 1960's with a new type of battery powered watch movement that uses a tuning fork to drive the accuracy. These watches were (and still are) extremely popular because they were so innovative. An Accutron was immediately recognizable because the first models had no winding crown, the second version, like yours placed the crown (used only to set the time and date) at the 4 o'clock position. By the mid 1970, quartz watches gained popularity because they were so cheap to make. Bulova no longer makes this movement but still uses the Accutron name to denote accuracy. An 18 k version is moderately uncommon but I wouldn't go so far as to call them rare.
For now I didn't see an exact model designation but I'm going to take another look later to see if I can find it.
Oh, almost forgot....it's most likely that the box you have is not original to the watch, an 'automatic' movement is completely different than the Accutron movement you have.
I don't find any adverts that show this exact version. Here is a page from an annual report showing a Calendar M but the dial is a different color. I'll suggest a designation of "Accutron Calendar" for this beauty. I like the tuning fork hour markers.
1965 Bulova Accutron Calendar