Wooden Propeller

[Hoogie44]

I have an old Wooden Propellor that I would like to find out more about and possibly the value:

The diameter of the propeller is 78 inches.

numbers on the prop - A2511 DFS 78F1-60

There are 4 Bolt Holes

The bore hole is 3 ¼ “

The bolt holes are 5 ¼” center to center.

The size bolt holes is 3/8"

Decal is Flottorp - Grand Rapids MI

[Dave]

The 4 bolt holes are unusual, but the size and pitch are certainly consistent with a certificated aircraft. I know that there was a Kinner engine hub used on an Interstate L4 that had a 4 hole hub, but I have no idea if yours was used on that or not.