Jaeger LeCoultre Quartermaster "Mercury Mission"

The LeCoultre QuarterMaster was manufactured for the US market in the 1950s. It is a rare watch, estimated to be made in approximately 2500 examples, specifically for the American market.

What's the amazing story behind this model?
The seven Mercury astronauts were introduced to the public in April 1959 and Alan Shepard made the first crewed Mercury flight.
While they were training, a NASA engineer named Harold Johnson determined that, because they would be orbiting the earth every 90 minutes, and constantly moving from areas of daylight to areas of darkness, it would be important for the Mercury astronauts to be comfortable reading and communicating in "24-hour time"
The watches that were given to the Mercury Seven astronauts were the LeCoultre Quartermaster model, except that the dial and hands of the Quartermaster were refinished, to remove the ornate numerals and markers and to repaint them in the style of a military watch - the bright white Arabic numerals and hash-marks, with bright white hands.