My friend show me his latest Rolex GMT master II watch. One of the most wanted (and expensive) model from Rolex, can be identified easily.
The full name of the Rolex watch is Rolex Oyster Perpetual Date GMT Master II. The first version was introduced in 1954, it is a professional watch use by pilots and navigators. The watch provide a second time zone display, the Master II added the third timezone display.
It could be easy for electronic device. You can add a few timezone display on the World Clock application on the smartphone, but making different timezone working on mechanic is different, especially back in 1954.
if you can not afford a Rolex, just try a smartphone.
PS. A Lawyer joke here: Where is my Rolex?