First and Reverse Gear (Topshaft) - 1682688M1
suitable for Massey Ferguson - 1682989M1 189439M1 898912M1 Models 1080, 1085, 1200, 122, 130, 133, 135, 135 Petrol, 140, 145, 148, 150, 152, 155, 158, 165, 168, 175, 178, 184, 185, 188, 230, 233, 234, 235, 240, 243, 245, 250, 253, 254, 255, 260, 263, 265, 270, 275, 283, 290, 295, 298, 335, 340, 342, 35, 350, 352, 355, 360, 362, 365, 372, 374, 375, 382, 383, 384, 387, 390, 390T, 393, 396, 397, 398, 399, 4215, 4220, 4225, 4235, 4240, 4245, 4255, 4260, 4265, 4270, 4315, 4320, 4325, 4335, 4345, 4355, 4360, 4365, 4370, 50B, 50H, 550, 560, 565, 575, 590, 595, 65, 670, 675, 690, 698, 698T, 699, 765, 180, 20E, 20F, 415, 435, 440, 425

For 1st speed on 6/8 speeds, with 44 teeth
Suitable For - Massey Ferguson models , 1080, 1085, 1200, 122, 130, 133, 135, 135 Petrol, 140, 145, 148, 150, 152, 155, 158, 165, 168, 175, 178, 184, 185, 188, 230, 233, 234, 235, 240, 243, 245, 250, 253, 254, 255, 260, 263, 265, 270, 275, 283, 290, 295, 298, 335, 340, 342, 35, 350, 352, 355, 360, 362, 365, 372, 374, 375, 382, 383, 384, 387, 390, 390T, 393, 396, 397, 398, 399, 4215, 4220, 4225, 4235, 4240, 4245, 4255, 4260, 4265, 4270, 4315, 4320, 4325, 4335, 4345, 4355, 4360, 4365, 4370, 50B, 50H, 550, 560, 565, 575, 590, 595, 65, 670, 675, 690, 698, 698T, 699, 765, 180, 20E, 20F, 415, 435, 440, 425 for OEM's 1682989M1, 189439M1, 898912M1, 1660917M2, 1682 688M1, 1682688M1, 1682688M2, 520700M1, 520700M2, 520700M4, 520700M3