I have been given a wooden propeller

[hurr]

Wooden ,five layers laminated,tool marks indicating cnc milling still visible. Six bolt holes in a circle surrounding another same diam. hole central : 100-58X50-20 stamped in an arc around where a flange has ,at some time been bolted .Diam.hub 6 3/8 inches Hub width 3 3/4 inches Blade tip to tip 58 1/4 " I would be glad for any feedback Thanks !

[Dave]

Lots of possibilities. Are the tips squared off? It might be an airboat propeller or an ultralight propeller, and they often have the length and pitch stamped as "nn X nn", where nn is the length and pitch in inches.

Can you post a picture?