United States. (United States - Possessions - Guam). 1930. Illustrated envelope (United States flag and War Ship) hand-stamped 'Government Official Correspondence', erased and endorsed 'Private' in red crayon with 'P. Mango Packet Steamer' addressed to 'Lt Charles Carter, U.S. Weather Station, U,S,N, Port Mexico, Guam' bearing 'Guam Guard Mail' Yvert 5, 2c yellow-green tied by Agana/ 21/ Aug' hand-stamp (struck 3 times) with circular negative seal in carmine and hand-stamped 'PAID/ 2' on face.
When Commander Willis Winter Bradley Jr. took over as 29th American Governor of Guam he devised a system whereby a local bus company "Bordallo's Taxi' would pick up and deliver the mail from the offices of village mayors. Bradley overprinted US stamps for this purpose with a supply from the Philippines. This service was the GUAM GUARD MAIL and served the villages of Hagatna (Agana) Piti, Sumai, Asan, Malesso and Inalahan.