Maurice Lacroix Masterpiece Triple Retrograde Clous de Paris MP6538-SS001-110-1. A generously proportioned 43 mm stainless steel case to ensure that the display is legible and easy to read. Beneath these functions, the ML291 calibre ensures the smooth operation of the Triple Retrograde Masterpiece. Highly efficient, it perfectly combines a SW200 automatic winding movement with a manufacturing module developed and assembled in Maurice Lacroixs workshops. This meticulously finished calibre is visible through the sapphire case back.