1931-10-28 Air mail Big Pigeon
- Year: 1931-10-28
- MI numbers: 235-241
- More information: perf. 11 1/2;
- MI catalog quantity / copies: 235-350000, 236-350000, 237-350000, 238-350000, 239-200000, 240-200000, 241-200000
- SC numbers: C5-C11
- LC numbers: 256-262
- Country: Bulgaria
Published by:
dido