There are watches made of the most sumptuous materials including moon stone, packed with intricate complications and features galore, but one challenge will always remain in horology, the challenge for a true constant force. The certainly young watchmaker Romain Gauthier unveiled a new patent-pending solution with the Logical One and its distinctive advanced chain-and-fusee constant force system with strong and low-friction ruby chain links and a snail cam substitution for the old fusee. Further notably features of the 43mm red gold watch are a 60 hours power reserve and a push button winding system, which is set into the case.