Looking form information on my wooden propeller

[istari]

I have a wooden propeller I received from my father many years ago. It is wood, approximately 42-48" long with red tips and was made by U.S. Propeller Inc.
It also has the following information marked on it
22008-1
SER CB 842
and just below that in a small circle
USP
3

Any information about when it might have been manufactured, what sort of plane it might have been used on, and what value it has would be appreciated. Thanks.

[Dave]

It's was for a UAV (unmanned aerial vehicle), most likely a target drone. It is believed that those models were manufactured during or shortly after WW2.

That model and a similar model seem to be quite common, implying that a large number were manufactured then the demand fell off sharply, creating a surplus that then gets distributed widely. We've seen the same thing with certain models of WW1 propellers and some other WW2 aircraft propellers.