Official Postal Seal - CSS OS 13 on 1933 cover from Pueblo Mexico to Hong Kong, mistakenly sent via to Yang Chow, China, returned to Mexico, where it was opened to find the sender's address. Readdressed and sent. Seals were applied at Canton. (2 images)

Official Postal Seal - CSS OS 13 on 1933 cover from Pueblo Mexico to Hong Kong, mistakenly sent via to Yang Chow, China, returned to Mexico, where it was opened to find the sender's address. Readdressed and sent. Seals were applied at Canton. (2 images)