Rare Stamps & Postal History of the World

1918 (11 Oct) "U.S. Postal Agency, Shanghai, China", discernible strike of Siberia provisional duplex on "War Department, Headquarters American Expeditionary Forces, Siberia" corner card soldier's cover to Pacific Grove, Cal., red box "A.E.F. Siberia, Censored" handstamp, v.f. for this rare forerunner postmark which seldom appears clear and more often barely legible (the first American troops of the A.E.F. arrived in Siberia in September of 1918. Since there was no cancelling device available, the Shanghai duplex was provisionally used for three weeks until October 17th when new the assigned canceller arrived)
Estimate: $500