Questions about Fahlin Propeller

[Tom R.]

I have a 31" Ole Fahlin wooden propeller that my mother gave me many years ago. Ole Fahlin gave it to her when she worked at Stanford U. and he was associated with engineers there. It appears to be in immaculate condition, and also appears to have been used, or at least tested vigorously: the holes (6) on one side of hub appear to be have what look like to be rough countersinking, as if from torque. I'm neither a pilot nor aviation expert so I may not be using correct terminology. It has two identical decals "Fahlin Propellers, Superior Performance, Ole Fahlin, Sunnyvale CA. I'm interested in selling it. Any idea regarding its value?

[Dbahnson]

Can you post photos? Thirty one inches is too short for a certificated aircraft but it might be a target drone prop or some other application, even possibly a salesman's sample.

[Tom R.]

[Tom R.]