Self-winding movement with Co-Axial Escapement. Brown PVD coated movement with spiral pattern, hand polished bridges and mechanisms, platinum oscillating weight. Central tourbillon cage rotates completely once every minute, offsetting the effect of gravity on the performance of the watch. Officially certified chronometer.
Version 2600A non-chronometer
Version 2600B chronometer
Version 2633A skeletonized
Version 2635A co-axial
Version 2636A co-axial, skeletonized