H. Moser & Cie. HMC 343

The HMC 343 is an automatic movement with moon phase complication, developed in-house by H. Moser & Cie. It incorporates the proprietary Straumann hairspring and powers the Endeavour Perpetual Moon collection. The large moon phase display maintains accuracy for 1027 years, reflecting the brand's emphasis on high-precision complications. Introduced in 2018, the movement remains in production and is closely associated with Moser's signature fumée dial aesthetic.