Centre stand spring for Norton single down tube brazed frames with swing arm, 1953 to 1957? Should also fit other models except featherbed, Outside diam 3/4in, swivelling eye on each end, eyes are 6-3/4in between centres fully extended, 3/8in internal eye diam, eyes restrained approx 5-5/8 inch centres Original Part Number: 16937; H12/527 - Prop stand return spring
