Chip 171 was delivered to a distributor in Oakland. Since the BPOE in Oakland is number 171, I assumed that chip 171 was a BPOE. However, there was always the possibility that 171 could have represented a Club 171. Also, there already was a BPOE 171 chip with an elk's head (the yellow one shown below). There was alway the lingering doubt.

I think the matchbook settles that.