for all Singer sewing machines with pneumatic starter such as Singer Harmonie, Singer Concerto, Singer Serende Singer 4610, 4623, 5932N503, 6230, 6233, 6234, 6235, 6244, 6267, 6268, 7000, 7004, 7005, 7015, 7028, 7033, 7037, 7043, 7050, 7060, 9110, 9113, 9117, 9124, 9130, 9133, 9137, 9143, 9210, 9217, 9224, 9240, 9410, 9416, 9430, 9444 ......)