| USA Airmails | 1931 (Aug 30) Chicago - Colombia, Medellin (8 May). Via Barranquilla (6 May). Air fkd envelope 30c rate + Scadta columbia 25c lilac gold issue. Air label Muller type 21. CML-B-8b (Mair). Fine. |
U$ | 65 |
| USA Airmails | 1931 (Aug 30) Chicago - Colombia, Medellin (8 May). Via Barranquilla (6 May). Air fkd envelope 30c rate + Scadta columbia 25c lilac gold issue. Air label Muller type 21. CML-B-8b (Mair). Fine. |
U$ | 65 |