VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1929-1932 keysring if anyone has any information on basco ke

Wonder if anyone has any information on Basco keys. I am cleaning out some stuff and stumbled across some old basco keys. These keys are the same size, configuration as the 29-32 electrolock keys, but so not state "electrolock" on the side of the keys. But is stamped Briggs and Strattan and has a "p" code followed by three numbers.

Are these later Chevrolet ignition keys? or maybe something else altogether?

According to an old key code book they can be Packard, Peerless or Pontiac depending on the number following the letter P.
Peerless 1-200
Packard 551-600
Pontiac 251-450

Pontiac it is then.

Thanks