Patek Philippe 300

Caliber 300 is Patek Philippe's automatic movement introduced in 1959. As an in-house caliber, it reflects the manufacture's early commitment to vertical integration in movement production. The caliber remained in production for several decades before being discontinued, serving as the base for numerous vintage references throughout its manufacturing run. It stands as a historical cornerstone within Patek Philippe's caliber family, representing the brand's mid-century approach to reliable automatic winding systems.