... The chips appears to be a Burt c&s. During the time frame from 1931-1946, USPC made c&s.

Burt took over for USPC. I do believe there was a time period where both companies made c&s, however I don't believe it was 15 years.

I wonder what Larry based the 15 year peiod on: when such chips were made or actual information on the existence of the Club