1967 Bulgaria Butterflies Postage Stamp Set

This is a collection of eight vintage postage stamps from the Narodna Republika Bulgariya (N.R. Bulgaria), specifically from a series issued in 1967 featuring various butterfly and moth species. Each stamp is rectangular with standard serrated perforations. The set displays a range of denominations from 1 stotinka up to 13 stotinki. The illustrations are finely detailed and scientifically labeled with Latin names such as Parnassius apollo, Lycaena meleager, and Vanessa antiopa. The color palette varies across the set, featuring vibrant blues, oranges, and earthy tones against cream or light gray backgrounds. These stamps are cancelled-to-order (CTO) or postally used, as evidenced by the black circular date stamps, one of which clearly reads '22.1.67' and 'SOFIA'. The stamps appear to be in good aesthetic condition, mounted behind a clear protective strip on a white stock card. There are no visible tears or significant staining, though typical light aging of the paper and minor blunting of perforation tips are present. This collection represents a popular mid-20th-century philatelic theme (Topical: Fauna) and showcases the high-quality offset printing common in Bulgarian stamp production during the socialist era.