American Polish Relief Expedition. 1919 picture postcard from Warsaw, Poland with "R Snidow 1st Lt. C.A.C., A. Pol. Relief Exp." endorsement at top, card sent by courier to Paris where it entered the mails with "U.S. Military Postal Express Service, No. 702, 17 Mai 1929" cds (year date error); non-contemporary notation at lower left, otherwise Very Fine, an extremely rare usage. Estimate  $500 - 750. $0 (Image)