Introduction and Launch: The Rolex calibre 530, introduced around 1936, is a vintage movement that powered early Rolex models such as the iconic Bubbleback. It embodies classic Rolex design principles with its self winding mechanism, small seconds display, and round shape, reflecting the brand's renowned precision and reliability. This calibre marks Rolex's early foray into mechanical watchmaking, showcasing their commitment to precision and durability from the outset.