Singer 500 503A Rocketeer Sewing Machine Bobbin Winder Thread Tension Guide Simanco 172557

Singer sewing machine bobbin winder thread tension tension guide, compatible with the 500 / 500A and 503 / 503A Rocketeer. Nice vintage condition, clean and rust free. Genuine, original Simanco part, assembly consists of #172557, #141027, #45847, #172558 and #129158.