The Rolex Bubbleback 3131 watch was one of the first automatic watches produced in the 1930’s, as well as one of the earliest Rolex models manufactured.  While Rolex was not the first to create an automatic movement, the company patented its first successful self-winding wristwatch in 1932 and introduced the Bubbleback one year later.  Despite the well-known nickname, Rolex never officially called their Reference 3131 the “Bubbleback.”  It earned this.. Read More