Swiss. 40mm case diameter, circa 1990. Originally designed and created at the request of a Pan-Am pilot, the GMT-Master first came to life in 1954. Since its inception, the GMT has become the standard by which all other dual time zone watches are measured. Though it has seen a few design and movement changes over the last several decades, the pure simplicity of the watch remains. Durable, easy to use and legible, the GMT Master II will never fall victim to trends or fads. This example, in 18kt yellow gold and steel, sports a Jubilee bracelet creating a refined look. This watch comes with an inner box and Rolex service card from 2018. The watch was found to be running at the time of cataloguing. It has not been tested for timekeeping accuracy and may require adjustment. CODE:WRI