metal twin blade prop boat motor propeller steam punk vintage upcycle parts

Vintage metal dual bladed boat propeller... probably from an outboard motor. It has worn old industrial green paint It's aluminum I think, non-magnetic and certainly not brass.

This propeller measures approximately 8" in diameter and 1.875" across (at the large end), the tapered spline. The spline is 18 teeth around. I don't know what motor it fits, but it would be great for steampunk decor projects or upcycled and repurposed.