Research suggests that 14 Rolex reference models, both vintage and modern, were assigned to the “Explorer” line. Of this group, the reference 5500 may be the most unusual since it is a hybrid watch. Rolex, like most brands, built upon early successes and often made subtle changes to a timepiece, gracefully evolving predecessor models. The reference 5500 is a crossover watch composed of an “Air King” case, but fitted with the classic 3-6-9 Explorer dial. Rolex produced two variations of the 5500: the “Precision” with the caliber 1520 and the “Super Precision” with the chronometer-certified caliber 1530.

Manufactured from 1958 until 1967, the present example with a caliber 1520 and correct “Precision” signature dates to 1965. The present lot is an interesting and uncommon example of the Explorer, offering great value for fans of vintage Rolex sports models.