According to USPC records, the chips were delivered in 1927 to their New York office for "Gonales (sic) Padin", a distribtor. Gonzalez Padin was a large department store (and distributor of USPC chips) in San Juan, PR.

The chip shown in the scan below was also delivered to Gonzalez Padin in 1920.

Lastly, Al Rollins is positive it's PR (and he wants it!)