The Maurice Lacroix Only Watch 2023 is presented in a sapphire case, a first for the Maison.

The making of a sapphire crystal case is protracted, necessitating numerous hours of polishing. Measuring 43mm in diameter, this colourless housing affords views of the hand-wound movement within.

On this watch, the hours and minutes are shown on an off-centre dial appointed with black indexes, each suffused with Super-LumiNova and presented in a different hue, again repeating the rainbow look.

The in-house skeleton movement, the Manufacture Calibre ML330, is the star of the show. The sapphire case and the openworked design allow the wearer to see the regulating organ, the mainspring in various states of tension, the gear train and even the keyless works.

The watch is presented on a grey M-branded nylon strap paired with a stainless steel butterfly buckle and features a user-friendly strap-exchange system.