Franck Muller skeletonized watch, identifiable by the prominent "FRANCK MULLER" inscription on the movement and its distinctive tonneau (barrel-shaped) case. Franck Muller is a renowned luxury Swiss watchmaker known for its high-end timepieces and complex movements. Skeletonized watches feature a transparent dial or case back that reveals the intricate inner workings of the watch movement, showcasing the gears, springs, and other components. The design of Franck Muller watches often blends modern aesthetics with traditional Swiss watchmaking techniques.

Franck Muller watch, specifically a model from the Cintrée Curvex collection, identifiable by its distinctive tonneau-shaped case and visible movement components. Franck Muller is a renowned luxury watch brand known for its high-end timepieces. The brand was founded in Switzerland by Franck Muller, who was born in Switzerland in 1958. Franck Muller watches are recognized for their in-house movements and intricate complications, which contribute to their value and require skilled craftsmanship.