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desc_issuer: Sudan desc_issue: 1950 air desc_denom: 20pia Used by 1 overprinted stamp: Sudan airmail official 7/1/1950 20pia pur&blk issue=1950 official d=General Post Office, Khartoum on=issue=1950 air-20pia wmk=mult SG perf=12 Matches 1 type: Sudan airmail 7/1/1950 20pia pur&blk issue=1950 air d=General Post Office, Khartoum wmk=mult SG perf=12 |