3 Answers

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The GMT-Master and the GMT-Master II are often link associated with space, although never in an official capacity with any space programs. Instead, they’ve been popular personal watches to bring up. NASA Astronauts Lloyd Blaine Hammond and Leroy Chiao both wore their examples on a number of missions, three missions for Chiao link and link two for Hammond in the 1990s.

In pendulum clocks the problem was caused by temperature-related link changes in the length of link the pendulum the best solution to the problem turned out to be link using special materials like quartz or one of the nickel-steel alloys like Invar which have very high dimensional stability across varying temperatures.