Technical sheet
Co-Axial Master Chronometer in 26 mm: free-sprung silicon balance at 3.5 Hz, 55 hours.
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 |
| Co-Axial escape wheel | 20 | 8 | 10.5 rev / minute |
Disclaimer
This is an approximation of the Omega 8800 layout from public drawings and photographs, not a manufacturer-accurate replica. Bidirectional automatic winding, the Co-Axial escapement, the free-sprung balance with a silicon (Si14) hairspring, 25,200 vph (3.5 Hz), 55 hours from a single barrel, the date, resistance to 15,000 gauss and the rhodium-plated finish with Geneva waves in arabesque are published Omega figures; 35 jewels, Ø 26.00 mm and 4.60 mm height come from the press and reference databases (some databases give 29 mm and 5.50 mm, which are the 8900’s figures). Tooth counts, the escape-wheel tooth count, the Co-Axial geometry, the barrel position, the seconds drive and the outlines of the bridges hidden under the rotor are an approximation; the tooth counts make the fourth wheel turn once a minute and the escape wheel match 25,200 vph. Parts are drawn larger than life for legibility and the stack is taller than the real movement. The escapement motion is a kinematic model, not a physics simulation.
Sources