This is a find from an incredible estate sale of a guy who had three sheds full of "stuff" to the brim. Hundreds of fishing rods, etc. Absolutely insane. I have no idea whether, or how much, he used this prop. I also have no idea what it will fit, it has a pin drive. Someone identified a similar one as "Propeller, O'bd OMC V4 '60-'68 10 X 9 1/4 ". Make a guess.