I don't believe I said that the Chauncey Olcott cards were by Chauncey Olcott. USPC made both the chips and cards as advertising items for the William Mulford & Son, Cigar maufacturers out of Unadilla, NY.

Here is an advertising chip for the NY Consolidated Card Co (later acquired by USPC)

Although not a USPC advertising chip, these cards and chip were made for usps CoB Clifford E. Albert celebrating 50 years at the company