Introduction and Launch: The Rolex calibre 2135 is an automatic movement featured in the Lady Datejust, known for its quick-set date function. Introduced as the successor to the calibre 2035, it was designed for ladies' and midsize Datejust models, offering a compact yet reliable design. Measuring just 20mm in diameter and 5.83mm in height, this 29-jewel movement provides a 42-hour power reserve, ensuring both precision and practicality in smaller watch cases.
