| New Guinea 1931 Airmail set to 5sh choice M |
| New Guinea 1931 Airmail Set to 5sh M |
| New Guinea 1931 Airmail £1 Gray choice MVLH |
| 1931-1934 WINGED GLOBE US AIRMAIL STAMP 5-6-8 CENTS |
| 1931 AIRMAIL, 2nd anniv. Orlando FLORIDA Airmail Serv |
| 1931-34 WINGED GLOBE US AIRMAIL STAMPS-#C12, 16, 17, 19 |
| 1931 - Los Angeles, CA 20th anniversary airmail flight |
| 1931 Jackson, Misssisippi airmail cover signed by PM |
| 1931 Experimental Ship To Shore Airmail Transfer Cover |
| Ethiopia - RARE 1931 Classic Airmail Complete BLOCKS |
| PARAGUAY 1931 rare ESSAY PROOF pair airmail SHIP PLANE |
| Brazil - 1931 Airmail- Mint Lightly Hinged -Scott # C28 |
| Hungary 1931 Airmail Etiquette |
| Czechoslovakia 1931 Airmail Etiquette |
| US #C16 MNH 1931 Winged Globe Airmail 5c |
| Australia 1931 Plane/Globe 6p Airmail (C3) VF used |
| AUSTRALIA - 1931 6d SEPIA AIRMAIL USED C.£13 |
| AUSTRALIA - 1931 6d AIRMAIL OFFICIAL OVPT USED CAT.£48 |
| 1931 Maritime & Newfoundland Airmail--VFMNH |
| Newfoundland 1931 Airmail 50c green wmk'd #C10 VF mlh |
| 1931 Maritime & Newfoundland Airmail--VFMLH |
| Stamps Newfoundland 1931 $1.50 Dox airmail (SG 221) MVL |
| SPAIN SC#C68-72 MNH 1931 AIRMAIL COMP SET |
| RUSSIA C22a 1931 20k AIRMAIL MINT NEVER HINGE L5 |
| United States 1931 San Francisco to Hong Kong airmail |
| ARGENTINA 1931 TRANSATLANTIC Airmail with TB aid stamp |
| Iran 1931 multi franked airmail cover to Germany |