The GMT Master probable period of production was from 1960s to 1980s with Caliber 1575 housed in the GMT special 40mm-diameter Case. The thickness of the "carrure" which increases slightly, a bezel with different and more pronounced external reading, and the two crown guards on the sides of the crown. The Rolex GMT Master comes with Plexiglas crystal and the date is shown magnified by the "Cyclops" lens.
The Rolex GMT Master has the normal second, minute and hour hands and the date, and in addition a revolving bezel, calibrated into 24 hours and a red 24 hour hands. Consequently it may be used to tell the exact time at two places on the earth at once (Two different Time Zones). The red 24 hour hand revolves once around the dial every 24 hours and is directly connected to the normal hour and minute hands and moves with them, either during the normal running of the watch or when the hands are being set.
The GMT Master was designed by Rolex to meet the very special and exacting needs of the flying personnel. The twenty-four hour hand constitutes an important aid. It also met with an enthusiastic reception from members of armed forces and international business men to whom the knowledge of local time only is insufficient.

To give distinction to your wrist a retro timepiece like one of the Interwatches Select Vintage watches is needed. Every watch collector knows the value of these particular and hard-to-find Rolex GMT Master watches. The Select Vintage watches are exceptional timepieces.
With the warm felling given by the Plastic material of the glass, this kind of watches brings you more than a different finish. Nowadays watch-manufactures try to imitate these old design watches relaunching previous watch series but without this special glass material. This watches, like the Rolex GMT Master Ref. 1675, are discontinued pieces and this fact makes them collectible. Moreover a Select Vintage watch will gain value over the years. For all these reasons lots of watch user's prefer plastic crystal watches.
As well as collectible cars, an Interwatches Select Vintage watch will increase your prestige and knowledge, in this particular case, about the history of watchmaking. Being at the same time an excellent investment, the choice of an Interwatches Select Vintage Rolex GMT Master Ref. 1675 watch is a question of good taste and style.