Description

Born for the Jet Age: A Pilot’s Watch That Became a Legend

The Rolex GMT-Master’s origin story is inseparable from the birth of commercial long-haul aviation. In the early 1950s, Pan American World Airways was expanding rapidly into intercontinental routes, and its pilots faced a new operational headache: keeping track of departure-city time, destination time, and Greenwich Mean Time simultaneously across transatlantic flights. Pan Am approached Rolex with the request, and in 1954 Rolex answered with reference 6542 — a watch built around a fourth, 24-hour hand and a rotating bezel that together let a pilot read a second time zone at a glance, without any additional math. Early 6542s are famous among collectors for details that reveal just how experimental the concept still was at launch: the earliest dials didn’t yet say “GMT-Master” at all, instead printing the depth rating “50m = 165ft” in red above the 6 o’clock marker, and the bezel itself was made not of steel or ceramic but of Bakelite, an early plastic chosen for its non-reflective finish so it wouldn’t glare into a pilot’s eyes in the cockpit. The watch was an immediate success, adopted by Pan Am as the official timepiece of its flight crews and soon worn by other international airlines’ pilots as the de facto standard for tracking multiple time zones in the jet age.

The reference 16700 sold here, produced in 1991, sits several generations downstream of that original 6542, in the era when the GMT-Master had matured from an aviation tool into one of Rolex’s flagship sport references. Introduced in 1988 as the direct successor to the 16750, the 16700 kept the GMT-Master’s classic 40mm Oyster case — with its crown guards, screw-down crown, and the cyclops lens magnifying the date — while upgrading to a scratch-resistant sapphire crystal in place of the acrylic used on earlier references, and introducing the caliber 3175 movement in place of the outgoing 3075. This example carries the “Pepsi” configuration, the blue-and-red bicolor bezel insert that has become arguably the most recognizable colorway in the entire GMT-Master lineage, tracing its DNA all the way back to that original 1954 bezel concept. On a genuine 1991 piece, the black dial’s tritium lume plots typically develop the warm cream patina collectors specifically seek out on “neo-vintage” references of this era, and the bezel’s red half often shows the light fading that comes with decades of UV exposure — signs of honest age rather than defects.

Functionally, the 16700 preserves the GMT-Master’s founding brief almost unchanged: the orange-tipped 24-hour hand, geared to complete one full rotation every 24 hours rather than 12, works together with the rotating bidirectional bezel to let the wearer track a second time zone (or, with a bit of arithmetic using the bezel markings, a third), while the cyclops-magnified date window adds everyday practicality. It’s worth noting that the 16700 predates the GMT-Master II’s independently adjustable local hour hand — a refinement introduced on the sibling 16710 reference the same year — meaning the 16700’s hour and minute hands move together as a set, with only the 24-hour GMT hand and bezel doing the time-zone work, exactly as Pan Am’s pilots would have used it decades earlier. The caliber 3175 inside is a self-winding movement with 31 jewels, reliable and well-regarded, if less technically sophisticated than the movements found in later GMT-Master II references. Production of the 16700 ran until 1999, in notably smaller numbers than its GMT-Master II sibling — making well-preserved, unpolished examples like this 1991 piece an increasingly sought-after entry point for collectors chasing the GMT-Master’s original tool-watch identity, Pepsi bezel and all.