This two-timer from the jet age is technically and aesthetically the mother of all GMT watches.

Welcome to Watches You Should Know, a biweekly column highlighting important or little-known watches with interesting backstories and unexpected influence. This week: the Rolex GMT Master.

Introduced at the dawn of the jet age, the Rolex GMT-Master has become an enduring symbol of a time when travel was both more glamorous and more adventurous. 
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