I have a Michigan J-175 3-blade brass propeller for Johnson P-series motors from the 1930s to 1940s, including P-50 through PO-15. It is 12 inches diameter by 12 inches pitch. Prop is in excellent condition and does not appear to have ever been used. Asking $70.00, shipping in the U.S. included.
Jpeg pics available upon request.
PM or e-mail: csr112-n AT twcny DOT rr DOT com