Page 232 Pan American International Airlines White Dial GMT Master [Reference 1675] Circa 1960
This watch is extremely rare. Almost all Rolex GMT Master watches have black dials. Rolex originally developed the Rolex GMT at the request of Pan American International Airlines and in Rolex folklore they made black dials for the pilots and white dials for executives. The photo above shows the Pan Am logo engraved in the back of the watch.