Description: Rolex GMT-Master II ref 16710 Pre-owned Rolex GMT-Master II ref 16710 (1990). The modern GMT-Master II really took shape in the 1980s, when Rolex introduced a redesigned movement with an independent GMT hand, which was a major upgrade for frequent travelers. The inaugural model features had a slightly thicker case to accommodate the new mechanics, but by the late 1980s, Rolex had refined the formula with the 16710, giving it a slimmer, more balanced