Movement Serial No.:
Case Serial No.:
Here's an easy one - 1966 Counselor "A".
Intertwined square and circle case is unmistakable and correct me if I'm wrong, appears to have only been marketed for one year. Replacement band was on watch when I received it, and is as close as I can currently come to the original. A nice crisp example that keeps accurate time.
Reference ad also dated 1966.