Introduction and Launch: The Rolex calibre 520, introduced around 1936, marked an early milestone in Rolex's movement lineup, representing one of their initial automatically wound calibres. This calibre underscores Rolex's early dedication to mechanical excellence and durability in watchmaking. The calibre epitomises Rolex's vintage movement design, featuring self winding, a small seconds display, and a classic round shape. Its construction and finish embody Rolex's renowned precision and reliability, cementing its significance in the brand's watchmaking heritage.
