Technical sheet
Sellita’s 2824-2 clone: self-winding, 4 Hz, 26 jewels.
Features
Going train
| Arbor | Wheel | Pinion | True speed |
|---|---|---|---|
| Mainspring barrel | 84 | — | 1 rev / 7 hours |
| Center wheel | 80 | 12 | 1 rev / hour |
| Third wheel | 75 | 10 | 8 rev / hour |
| Fourth (seconds) wheel | 84 | 10 | 1 rev / minute |
| Escape wheel | 20 | 7 | 12 rev / minute |
Disclaimer
An approximation of the Sellita SW200-1 layout from public drawings and photographs, not a manufacturer-accurate replica. 28,800 vph (4 Hz), 26 jewels, Ø 25.60 mm casing diameter (26.00 mm overall), 4.60 mm height, date with quick corrector and stop-seconds are Sellita’s published figures. Power reserve: Sellita gives 38 h minimum and 41 h typical; older brand specifications usually quote 38 h. As a clone of the ETA 2824-2 it is modelled on the 2824-2 geometry: tooth counts, wheel sizes, the barrel position, the bridge outlines hidden under the rotor and the seconds drive are an approximation, with the fourth wheel turning once a minute and the escape wheel matching 28,800 vph. Parts are drawn larger than life and the stack is taller than the real 4.60 mm. The escapement motion is a kinematic model, not a physics simulation.
Sources