Early 60's!
1. During the time when the shop and Heiser ran out of BB snaps for the 2nd time.
2. Precisely when the shop and Heiser ran out of the small brown substitute snaps.
3. Precisely when Heiser switched over from stamping their logo to the horizontal Randall logo.
4. Just before the next shipment of BB snaps arrived.

A "perfect confluence" of happenstances. This period only lasted a few days.

Give me a tough one next time