A vintage set of five postcards with accompanying leaflet from the British Museum (Natural History). It is the Birds: General Series No.3 (Set C5), published in May 1939.
The postcards and leaflet come in the original British Museum envelope. Four of the cards are postcards (unused and not posted) and one is a card that is blank on the back.
The envelope has some wear to the edges. The postcards have some foxing on the back.