51. 1881. 5 cents gray. GUAYANILLA to SAN JUAN (PUERTO RICO). GUAYANILLA pre-philatelic cancel, in blue. MAGNIFICENT AND RARE USE OF THE PREPHILATELIC POSTMARK IN SUCH A LATE PERIOD.
We use our own and third-party cookies to improve our services. If you continue browsing this page, we consider that you accept its use in the terms indicated in the Cookies policy.