Introduction and Launch: The Rolex calibre 1030, introduced in 1950, was a landmark automatic movement utilised in various iconic models such as the Explorer, Deep Sea "Special", Submariner and Oyster Perpetual. Known for its exceptional functionality and reliability, this movement is known to have "a butterfly rotor" as it was so much smaller and lighter than the previous generation. It minimises wear and tear, ensuring long-lasting performance across its range of applications.