BELT Singer 502 507 Timing

Singer 500 series, 502, 507, 509, 513, 514, 518, 522, 527, 533, 534, 538, 543, 560, 560J, 800 series 802, 807, 809, 813, 814, 818, 822, 824, 827, 833, 834, 838, 844, 860, 1021, 1022, 1200, 1250HD, 1730, 1802, 1803, 1812, 1852, 1853, 1862, 1872, 1873, 2302, 2303, 2304, 2315, 2330, 2430, 2440, 2500, 2502, 2503, 2504, 2515, 2517, 2530, 2543, 2601, 2602, 2603, 2604, 2605, 2615, 2616, 2628, 2630, 2643, 2712, 2718, 2722, 2724, 2730, 2732, 2808, 2950, 3270, 3314, 3317, 3343, 4522, 4526, 4528, 4530, 453