A realistic metal lapel pin based on a traditional Bosnian door knocker (zvekir), keeping the full structure: circular backplate, ring, top mount, and bottom element. Design requirements: - The backplate (plate behind the ring) must be present and visible as an essential part of the design. - The plate should have minimal, clean ornamentation inspired by traditional Bosnian patterns (no dense carving, no small holes, no complex filigree). - The ring must be thick, robust, and clearly defined. - The top mount should be simple but slightly decorative, inspired by Ottoman influence but restrained. - The bottom element should have a recognizable drop-like shape (as in real zvekirs), but simplified for clarity. Style: - Authentic and realistic, not artistic or fantasy. - No excessive decoration, no intricate carvings, no micro-details. - Balanced between Bosnian simplicity and subtle Ottoman influence. Material: - Matte antique copper finish - Slight natural patina - No glossy or shiny surface Relief: - Soft 3D relief with clear separation between plate, ring, and elements Scale: - Designed to be manufacturable at small size (approx. 20–30 mm) - All lines must remain visible at small scale Lighting: - Natural, soft shadows - Realistic metal texture (not CGI-looking) Background: - plain black background Mehr sehen