Croatian "HRVOJE" Airmail Stamp (1943 issue)

This is a Croatian airmail stamp, likely part of the 1943 'HRVOJE' issue, specifically the 10 K. (Kuna) denomination. The stamp features a central motif of a stylized winged figure or heraldic eagle, possibly representing the mythological character Hrvoje, within a rectangular border. The primary color visible is a muted brown or sepia, indicating a monochromatic print. The design includes text, with 'HRVOJE' partially visible across the top arc and 'BRZOSLAVNA SLUŽBA' (Airmail Service) or similar wording in smaller print, though this detail is obscured. The denomination '10' is clearly visible in the lower left corner and 'KUNA' in the lower right, flanking an image of an envelope with wings, symbolizing airmail. The stamp has perforations along its edges, typical for postage stamps. There is a prominent circular postmark partially covering the central design and denomination, rendered in a dark ink, suggesting it has been used. Another dark linear mark or postmark is also visible across the top part of the stamp. The visible condition suggests normal wear for a circulated stamp, with the postmarks indicating its former postal use. The printing appears to be of reasonable quality for its era, with clear outlines and details in the design despite the postmarks and image resolution. The style and design are characteristic of postal issues from the Croatian puppet state during World War II, reflecting elements of nationalistic or historical propaganda common to that period.