Vintage Singer 27 / 127 / 28 / 128 sewing machine feed dog. Mulitple types of feed dogs were used on VS machines, this is part #8321 (please compare with your existing feeder) which is compatible with the #8323 throat plate. Very good vintage condition, may have typical discoloration consistent with age but will be clean and rust free. Comes with mounting screw. *Some earlier examples are unmarked but are genuine Simanco parts