A large four-blade marine propeller cast from a copper alloy, likely bronze. The item features four overlapping curved blades radiating from a central hub. The hub is configured with a tapered central bore and a single keyway for securing to a drive shaft. The entire surface displays a heavy and consistent green verdigris patina, indicating prolonged exposure to a marine environment. A modern white adhesive inventory label with the printed black digits 0231 is present on the surface of one blade. No original manufacturer marks, stamps, or cast specifications are visible in the provided images.
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