Butterflies and Lepidopterists - 4 Stamp Mint Set 9A-104

This is a beautiful sheet of 4 stamps, issued in 2012, featuring butterflies and lepidopterists. The stamps feature two kinds of butterflies with two lepidopterists (scientists who specialize in the study of butterflies and moths). Two stamps include images of British lepidopterist Dru Drury and the butterfly Charases euryalus, and the other two stamps include images of British lepidopterist Margaret Fountaine and the butterfly Danaus plexippus (commonly known as the Monarch). The set is Post Office fresh, mint never hinged, and F/VF.