The Omega 8500 and 8800 calibres wind in both directions, at a rate of 800 turns per day.
| Rotation direction | Bidirectional |
| Turns per day | 800 |
| Reserve 8500 | Approx. 60 hours |
| Reserve 8800 | Approx. 55 hours |
| Escapement | Co-Axial |
Two barrels, a higher rate
The 8500 uses two barrels mounted in series, which explains its long power reserve but also its need for more winding. That is why we recommend 800 turns per day rather than 650: there are two mainsprings to wind.
The more recent 8800 returns to a single barrel with a fifty-five-hour reserve. The setting stays the same.
The Co-Axial escapement
Introduced by Omega in 1999, based on an invention by George Daniels, the Co-Axial escapement reduces friction compared with the classic Swiss lever escapement. This means longer intervals between services.
A winder has no particular effect on this escapement, positive or negative. The setting question is still about the barrel.
These calibres are anti-magnetic
Omega's Master Chronometer movements resist fields of 15,000 gauss, which makes magnetism a largely theoretical concern for these watches.
If you own a recent Omega, you can place the winder wherever you like without special precautions. This is not the case for every calibre, especially older movements.
The Speedmaster Professional
Be careful not to confuse them. The Speedmaster Professional uses calibre 1861 or 3861, both of which are hand-wound.
A winder will do absolutely nothing for them: these movements have no oscillating weight, and no rotation will wind them. If this is your watch, what you need is a watch box.
Frequently asked questions
How many turns per day for an Omega 8500?
800 TPD, in both directions. The twin barrel needs a higher rate than average.
Is the Omega 8800 set like the 8500?
Yes: bidirectional, 800 TPD.
Does a Speedmaster Professional need a watch winder?
No. Calibres 1861 and 3861 are hand-wound: a winder will not wind them.
Can a watch winder magnetise an Omega?
Not a recent Omega Master Chronometer, certified resistant to 15,000 gauss.
Which watch winder to choose
For a single Omega, our single watch winders are suitable, set to bidirectional at 800 TPD. If it sits alongside unidirectional calibres, choose a model with independently adjustable rotors such as the Pégase Watch Winder.
Other calibres
See our Settings by calibre page, or our watch winders.
A question? contact@maisonorvian.com. We will also tell you if you do not need a watch winder.