Stamps of Bulgaria, 15 Jan 1940
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airmail
1940, Jan 15 1940 air issue unwmk p. 13 (12 stamps)
| - | 1l | dkgrn | mail plane ascending | |||
| X | 2l | crim | plane over Tsar Assen's Tower | |||
| X | 4l | redorg | plane over Bachkovski Monastery | |||
| X | 6l | dpbl | Bojurishte Airport | |||
| - | 10l | dkbrn | ||||
| - | 12l | dlbrn | ||||
| - | 16l | brtblvio | ||||
| - | 19l | brtbl | ||||
| - | 30l | roselake | ||||
| - | 45l | grayvio | ||||
| - | 70l | rosepink | ||||
| - | 100l | dpslbl |
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