A vintage marine screw propeller featuring four blades, cast from a heavy copper-based alloy, likely bronze. The propeller has developed a heavy aged patina with characteristic areas of green verdigris corrosion. The central hub is bored to receive a drive shaft and features a single keyway for attachment. No manufacturer names, serial numbers, or dimensional markings are visible on the casting. This piece represents a typical example of 20th-century maritime hardware.
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