What does “Fat Lady” mean?

'Fat Lady' is the nickname for the Rolex GMT-Master II reference 16760, the first GMT-Master II, introduced in 1983. Its case is noticeably thicker than the GMT-Master of the time, to make room for the new caliber 3085, which allowed the hour hand to be set on its own. That meant the wearer could show local time, home time on the 24-hour hand and a third zone with the bezel. It came with a sapphire crystal and a red and black 'Coke' bezel insert. Some collectors also call it the 'Sophia Loren'.

The 16760 was made for only around five years before the slimmer 16710 replaced it, so it is a short-production reference that collectors seek out. Dealers look at the glossy dial with white gold surrounds on the markers, the bezel insert, and the case, since a thick case with sharp, unpolished edges is especially prized. Box and papers are less common at this age, so complete sets carry a premium.

Example: '16760 Fat Lady, 1986, original Coke insert, unpolished case, service papers only.'