F.P. Journe Chronomètre À Résonance Ref. R Brass Rose Gold Grey Dial

Cool metal on warm metal. The dial plate here is white gold set into a rose gold case, which is the opposite of the pairing Journe usually chose, and it changes the whole temperature of the watch. Underneath is the resonance principle he spent years reducing to wrist scale: two movements timed to influence each other rather than run independently. Brass movement, so pre-2004. Collectors sort these watches by that one detail before any other.

The rose gold case measures 38 mm, which is the size the Chronomètre à Résonance held for its first decade and the reason early examples wear so easily. Two twelve-hour displays sit side by side in whitened guilloché silver, cut into the white gold plate, each fed by its own gear train. The two can be set apart to carry a second time zone. Almost nothing about the layout is there for decoration.