The late-production reference 16750 sits at the intersection where the GMT-Master evolved from a pure pilot's tool into a modern icon. It features an upgraded quickset caliber and a highly sought-after gloss-black dial finish, housed in a lightly polished case in excellent, thick condition. The crown jewel of this particular vintage piece, though, is the precise, perfectly even aging of the tritium lume plots to a rich, creamy off-white—”mustard,” as some collectors would call it—color that pops hard against the pitch-black mirror dial and punchy red-and-blue Pepsi insert.