Wooden propeller identification

[conniesu]

I have a Senseni,ch Model # 20-42 Serial # I0256 wooden propeller. I am trying to find out how old and the value of it.

Thank you
Connie

[Dave]

Sensenich began making props in 1942, but they are still in business. The design number is not a typical Sensenich number, which usually consists of the length in inches, the hub configuration letter code, and the pitch in inches, so something like "72C24" is common. See this list for Sensenich design numbers.

A picture might help, along with at least the measurement of length, from tip to tip. It may be a drone prop, or some other application.