BELT Timing Singer 242 247 248 250 series

Singer 257, 337, 338, 347, 348, 353, 354, 360 series, 1263, 1280, 2404, 3101, 3102, 3103, 3105, 4325, 6011, 6012, 6305, 6310, 6314, 6318, 7101,7108, 7174, 8502, 8505, 9502, 9505, 180XL cog type