Pillar Wheel Chronograph Nomenclature
Guide to Standard Swiss Part Numbers
| 8000 Chronograph Runner, Mounted | 8200 Blocking Lever |
| 8020 Minute Recording Runner, 30 Minute | 8220 Hammer, Mounted |
| 8040 Minute Recording Runner, 45 Minute | 8270 Minute Recording Jumper |
| 8060 Driving Wheel | 8290 Friction Spring |
| 8070 Pillar Wheel | 8320 Coupling Clutch Spring |
| 8080 Coupling Clutch, Mounted | 8325 Sliding Gear Spring |
| 8100 Sliding Gear, Mounted, 30 Minute | 8335 Operating Lever Spring |
| 8120 Sliding Gear, Mounted, 45 Minute | 8345 Blocking Lever Spring |
| 8140 Operating Lever, Mounted | 8350 Hammer Spring |
| 8180 Fly-back Lever | 8355 Pillar Wheel Jumper |