I have a new old stock Michigan J-140 aluminum propeller for the 1930s era Johnson A-50, A-65, A-70, A-75, A-80 and AA-37 models. It is listed as 9-1/8 inches in diameter and 6 inches in pitch. Comes in the original blue Michigan box. Box is mostly intact, but well shelf worn with torn seams. Asking $60.00, postage in the U.S. included. Photos available upon request.
Email: csr112-n AT twcny DOT rr DOT com