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Country: All Subject: Insuffient for Air Mail Clear | Sort: Newest listed first |

| NEW AMSTERDAM, British Guiana opened 2 sides full Pegasus illustrated Air Mail cover with QE2 9c rate pmk'd 13 FE 56, 3-line purple "Insufficient Postage for/transmission by/Air Mail.", no b/stamps. £15 | |

| BRITISH GUIANA postal history 1958(?) cover to Bodmin, Cornwall with QE2 5c pair, 6c pmk'd 23 MY with purple "NOT IN THE AIR MAIL." and 3-line "Insufficient Postage for/transmission by/Air Mail." handstamps. £16 | |


| INCONNU/NOT KNOWN/ONBEKEND applied PIETERMARITZBURG, Transvaal postal history with POLISH AIR FORCE boxed on GB KG6 1d cover from Blackpool 18 NO 42 with purple jusqu'a bars denoting insufficient for airmail, on arrival pmk'd 25 II 43/15 and 13 III 43/41 with 4 MAY 1943 return arrival backstamp, some peripheral faults. £95 | |