This Johnson antique outboard motor bronze propeller fits the P Series models made from 1930 to 1950. These are the 2 cylinder opposed models of 22hp. Michigan propeller # AM31. 10 3/4 diameter by 13" pitch. 3 blade bronze. RH rotation.  3/4" propeller shaft bore. There are nicks and small dents that can easily be polished out. Dress up your Johnson P50 to Johnson PO15 with this bronze beauty.   We have two of these that we were saving for our own engines but have decided to sell. Look at the photos and email with questions. Thanks for looking.