IWC Schaffhausen 51113

IWC caliber 51113 is an in-house automatic movement introduced in 2019 and still in production. It belongs to the 51xxx caliber family and features the Pellaton winding system, which is characteristic of IWC's long-running tradition of robust mechanical movements. The 7-day power reserve is a defining trait of this caliber variant, reflecting IWC's focus on practical extended power storage. It is used in the Portofino collection, particularly in the 8-day models.