Norton engine gasket set for OHV singles, 1948-55. Original Norton part numbers: A3/137; C3/137; D3T/137; 19705 - cylinder head gasket ( joint washer) C3/1557 - cylinder base paper washer C3/95 - rocker box inspection cover washer C3/88 - push rod cover, bottom, sealing washer C3/89 - push rod cover, top, sealing washer A3/166 - exhaust ring