Franck Muller is one of the most flamboyant and technically audacious watch brands of the modern era, established in Geneva in 1991 by watchmaker Franck Muller and businessman Vartan Sirmakes and rapidly becoming known for its motto of being the "Master of Complications." The brand's most recognizable design is the Cintrée Curvex — a dramatically elongated, curved tonneau case with concave flanks that created an entirely new case architecture and an unmistakably theatrical wrist presence. Within this distinctive exterior, Franck Muller packed an extraordinary range of complications including bi-retrograde perpetual calendars, tourbillons, minute repeaters, and the Aeternitas Mega — once recognized as the most complex production wristwatch ever made with 36 complications and 1,483 components. The Crazy Hours collection, which displays hours in non-sequential order around the dial, became one of the brand's most commercially successful and whimsical creations. Pre-owned Franck Muller watches in the Curvex, Conquistador, and Long Island families represent access to one of the most individualistic design languages in watchmaking at secondary market prices. DeMesy & Co. in Dallas has been authenticating pre-owned Franck Muller timepieces since the brand's early years, drawing on expertise established since 1987.