Franck Muller never ceases to amaze us at Ace Jewelers. The unconventional watch designs are always entertaining to look at. There are some timepieces however that are more traditional in style. Franck Muller is not one to adhere to the norm- unless an impressive feature is worked into the design.   franck muller cintree curvex double mystery ace jewelers amsterdam -5   The Cintree Curvex Double Mystery is a classic looking watch at a glance. The solid gold case, white dial and black numerals are easy on the eyes. The showstopping detail on this watch is the double mystery dial. Mystery clocks date back over 100 years. The original mystery wall clock featured a glass dial, with hands in the middle. No trace of the movement was visible through the glass dial, making it truly a mystery as to how the hands moved. Decades later, the mystery clock was adapted into a wrist watch. Franck Muller produced this clever dial which is made up three parts. The seconds hand is a disc directly in the middle which rotates once every minute. The hour hand is on another disk, which rotates once every hour. The concept was inspired by the original mystery clock, and to give the illusion of not knowing how the hour and minute hands moved. Stop by Ace & Spyer Jewelers to see the Cintree Curvex Double Mystery to see this stunning model in person.