1946 REGISTERED AIRMAIL POLISH FIELD POST OFFICE TO ILLINOIS, U.S.A. KGVI 2/6 YELLOW-GREEN (SG476b) ALSO 1d. Fine envelope sent registered airmail from Polish Field Post Office '115' to Illinois, Chicago, U.S.A. with fine 2/6 yellow-green (SG476b) and 1d pale scarlet (SG486) tied fine strikes 'POCZTA POLOWA/115' date stamps 18 VI 46. On reverse 'CHICAGO' date stamp JUN 30 1946. Unusual and clean usage. (Ref 143581).
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