Partly as a result of this, Pan American airlines approached Rolex, and the two companies began working on a watch that could easily tell the hour in two different time zones.
When reference 6542 was released in 1954 it became the official timepiece of Pan-Am Airline - and became Rolex's first GMT-Master ever produced. Their pilots found the watch to be a useful tool in the cockpit where many timing calculations were necessary over the duration of the flight. In addition, the simple ability to know what time it was 'back home' was very easy to see with the watch's Bakelite plastic bezel.
The present example has been well preserved and is exceedingly rare to see in yellow gold - a treat for collectors of precious metal tool watches.
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