Constant force is one of the holy grails of horology and with Logical One, Romain Gauthier has reinvented the chain-and-fusee.
Logical One features a triple patent-pending Romain Gauthier flat chain-and-fusee style constant force system with ruby chain links, ergonomic push button winding system, dial-side visible balance, mainspring barrel with sapphire inserts, plus a 60-hour power reserve indicator.
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