A GMT timepiece is another essential to consider having in your watch collection. It is a timepiece  with an independent hour hand that offers dual time-zone functionality and may be set to the Greenwich Meantime from which it is named. Greenwich Meantime is the highly-accurate solar mean time displayed at the Royal Observatory in Greenwich England. Since it was first instituted at the International Meridian Conference in 1884, the Observatory’s solar mean time has served as the global time standard for over 130 years. The Observatory’s GMT clock is highly-regarded throughout the globe for its time-keeping accuracy. It also is used as a reference…