Identifying my propeller

[Marc B]

I have a wooden propeller with copper trim about 8 feet long. There is an inscription on the center I would like to have help deciphering. The inscription: L.L-M 3.
Des. 86. M-5
RPM 32 20
MAR. 41

Can anyone help me identify the propeller?

Marc

[DonFromTX]

I have no idea. However, you might recheck the numbers, swinging an 8 foot prop at 3220 rpm probably would not work. I know on mine the stamped numbers can appear to be something that they aren't. Could it be 2220?
If we could get a photo it would be of great healp to the real information people here.