Create a realistic, high-detail 3D model of a medieval longsword. The blade should be polished steel with slight edge wear, fine scratches, and a fuller running down the center. Add a crossguard with a weathered iron texture, a wrapped leather grip with visible stitching, and a rounded pommel with engraved symbols. Include realistic metal reflections, roughness variation, and subtle dirt in crevices. Ensure proper proportions, detailed textures, and clean topology for use in real-time rendering or animation.

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