Help Identifying Propeller

[thomaslmarkus]

I dont know what kind of propeller it is or when it was made. All I know is that it was my dads.

I has U.S. Propellers Inc stamped on one side and on the other the numbers
22008
SER AT880

Then on the center it has AT880 pressed into the wood.

[Dave]

It's a UAV (unmanned aerial vehicle) prop. No one seems to know exactly what that model was used on, but they are very common.