What type watch automatic engines does rolex use?

Rolex primarily uses in-house automatic movements, known as "Caliber" movements. These movements are renowned for their precision, reliability, and durability, with notable examples including the Caliber 3130 and Caliber 3235. Rolex's movements feature innovative technologies such as the Parachrom hairspring and a self-winding mechanism, enhancing their performance and longevity. Each movement is meticulously crafted and undergoes rigorous testing to meet Rolex's high standards.