Romain Gauthier Logical One Final Edition Titanium: constant force in black and grey

The Logical One Final Edition Titanium pairs a brushed grey case with black enamel time displays and an exposed chain-and-cam mechanism. The ruby-linked chain helps compensate for changing mainspring torque, while a pusher winds the movement independently of the small time-setting crown. Its composition makes constant-force engineering part of the watch’s identity.

The hand-wound Logical One movement supplies a 46-hour reserve, with an indication on the back. Romain Gauthier announced this titanium farewell edition in May 2021, limited to twenty examples in a 43mm case. A separate white-gold edition was announced alongside it. Both photographs here show the black-dial titanium model, distinguishing this specific watch from the broader concluding collection.