1944 RCAF MPO 304 to Argentina, airmail, censor

1944 RCAF MPO 304 to Argentina, 30c airmail, censored. Black out cancel (OC 28 44) ties 10c, 20c War to Rio Gallegos, Argentina bs (22 NO 44).

Return address on back flap is  A/LA Fillingham, P.H. (FAA/FX 706415), MPO 304, RCAF, Ottawa.