Perfex compression piston outer ring, 1920
Perfex compression piston outer ring. Made by Perfex Motor Co., 1920.
Perfex compression piston ring, complete, and one ring dismantled, consisting of one inner spring and one outer ring, on a board.
Perfex compression piston outer ring. Made by Perfex Motor Co., 1920.
Perfex compression piston ring inner spring, made by Perfex Motor Co., 1920.
Stand for Perfex compression piston ring, complete, and one ring dismantled, consisting of one inner spring and one outer ring.