Thank you! The movement number is 2040316.

Also, would you happen to know what a reasonable estimate would be to service the watch. Runs fine, just want to have it cleaned and oiled.

I would appreciate any information that someone might have about this watch. I would guess that it dates from the 60's, early 70's. It has a pristine 818/2 movement, 10k gold filled. 1"x1" Thank you in advance.