The "Erivan" Collection of Western Postal History

Type 1 frank addressed to Sacramento, circular "Penny Post Co San Francisco" handstamp, manuscript correction deleting "to the care of the" (Penny Post), probably indicating a pure out-of-the-mails use from origin to Sacramento, 1c Blue (9) with manuscript cancel did not originate despite the opinion of the certificate, otherwise very fine, ex-Knapp, Emerson, Jessup, Haas, and Grunin, 2023 Philatelic Foundation certificate