| B Part no. | Part name | Caliber fit |
| 1100 | Ratchet wheel | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1100 | Ratchet Wheel | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1103 | Crown Wheel Seat | 550 551 552 561 562 563 564 565 600 601 602 610 611 613 750 751 752 |
| 1104 | Click | 550 551 552 560 561 562 563 564 565 570 750 751 752 |
| 1107 | Clutch wheel | 550 551 552 560 561 562 563 564 565 600 601 602 610 611 613 750 751 752 |
| 1110 | Setting Lever Spring | 550 552 560 561 562 563 565 570 750 751 752 |
| 1113 | Setting wheel | 550 551 552 560 561 562 563 564 565 600 610 750 751 752 |
| 1200 | Barrel With Arbor | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1208 | Mainspring | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1218 | Cannon pinion | 550 551 552 600 601 602 |
| 1219 | Cannon Pinion | 550 551 552 600 601 602 |
| 1240 | Third Wheel | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1243 | Fourth wheel | 550 551 552 560 561 562 563 564 565 600 601 602 610 611 613 750 751 752 |
| 1246 | Minute wheel | 550 552 560 561 562 563 565 570 750 751 752 |
| 1253B | Sweep Second Pinion | 550 551 |
| 1253 | Sweep Second Pinion | 550 551 552 |
| 1346 | Incabloc, lower | 550 552 560 561 562 563 565 570 750 751 752 |
| 1347 | Incabloc, upper | 550 552 560 561 562 563 565 570 750 751 752 |
| 1356 | Adjusting Spring for Regulator | 550 551 552 560 561 562 600 610 613 |
| 1400 | Rotor Axle | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1437 | Driving Gear For Ratchet Wheel | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1438 | Bearing For Driving Gear For Ratchet Wheel | 550 551 552 560 561 562 563 564 565 750 751 752 |
| 1441 | Satelite Pinion Of Ratchet Wheel | 550 552 560 561 562 563 564 565 570 750 751 752 |
| 1451 | Gib of Rotor | 550 552 560 561 562 563 565 570 750 751 752 |
| 1453 | Large connecting pinion for winding gear | 550 552 560 561 562 563 565 570 750 751 752 |
| 1453 | Wheel For Winding Gear | 550 552 560 561 562 563 565 570 750 751 752 |
| 1454 | Wheel For Winding Gear | 550 552 560 561 562 563 565 570 750 751 752 |
| 1464 | Winding Gear | 550 551 552 560 561 562 563 570 750 751 752 |
| 560-1253B | Sweep Second Pinion h 5.24 | 552 560 561 563 564 565 |
| 563-1108 | Winding Pinion | 563 564 565 613 750 751 752 |
| 563-1109 | Set Lever | 563 564 565 750 751 752 |
| 563-1110 | Setting Lever Spring | 563 564 565 613 750 751 752 |