Vintage Singer sewing machine slant shank button foot. Compatible with slant shank machines with zigzag capabilities, such as the 401 / 401A, 403 / 403A, 411G, 431G, 500 / 500A, 503 / 503A Rocketeer, etc. Very good vintage condition, bright and rust free. Genuine, original Simanco accessory, part #161168