This line features 28,800 vph movements in an 11.5 ligne manually-wound movement.
Although nine distinct variants of this movement have been produced, only two (2801-2 and 2804-2) remain in production. All are very similar, with many parts interchangeable and few variations over the years of production.
The main variants are:
- Day/Date - 2810, 2816, 2816-1
- Date only - 2804, 2804-1, 2804-2
- No date - 2801, 2801-1, 2801-2
Apart from an improved day/date component, the 2810 and 2816 are identical.