1967 Accutron Calendar
Beautiful watch. The 1968 advert linked below is a little fuzzy but I think it's a match.
Accutron Calendar X
Looks like a match to the Calendar X ad, other than the luninous dots.|
This dial appears to have luminous dots at the inside end of the markers - not separated from the markers as seen in the ad, or remnants of such. I agree with Accutron Calendar X