date and non date is two different variations of the same movement. the non-date is a 773x. most likely a valjoux 7730, or 7731, or 7733? the date version is the 7734...which is a 773x with a date function. basically they are the same movement...except one has a date and the other doesn't. some other minor differences, between all those variations....but for this discussion, the date is the biggest difference. hope that helps?

btw, welcome...and feel free to post pics of your monacos, silverstone, and carrera.

j.h.