The Rolex GMT is an ideal starter watch for Rolex fans. One of the ultimate status symbols, the name Rolex is synonymous with style, workmanship and fashion. When you're looking to purchase a Rolex GMT, purchasing from an authorized Rolex dealer is the best way to protect yourself from fakes. If you're purchasing the watch secondhand, look for a few defining features in order to tell whether your GMT is the real deal or you're being taken by a clever and sneaky seller.
Separate the lugs at the 12 position by counting the lugs from the face. There, you should find the Registered Design number for the GMT, which will be 1675, 6542, 16700, 16713, 16750, 16753 or 16758 for the Master model and 16710, 16713, 16718 or 16760 for the Master II models. Then, check the sixth lug to find the serial number for the case, which will vary. Either way, fakes rarely have the numbers engraved at all.
Flip the watch over to look at the caseback. Rolex has never made a skeleton or see-though caseback, so that's a quick indication of a fake, notes ProductDose.com. The caseback should be solid with a hologram sticker with the Rolex crown. Move the watch back and forth to ensure that the hologram moves; clever fakes have the colorful sticker without it being a real, working hologram.
Examine the watch face for the micro-etching of a crown at the very bottom, under the position where the number six should be on the clock face. It's a luxurious touch that is unique to Rolex watches. Run your finger over the crown to see if you can feel the etching. A fake may have the crown, but it could be painted on and a clear fake.
Look at the color of the watch face. It's important to note that all GMT watches, regardless of their model and style, will have a black face. Any other color, whether it's white, blue or silver, denotes a fake.
Consider both the seller and the price before buying. The only way to guarantee an authentic GMT is to purchase through an authorized dealer. If you must purchase used, ensure you're purchasing from a seller you trust. Keep in mind that the price of a GMT hovers between $6,000 and $9,000 as of 2010, and designer goods rarely sell for less than 30 percent off of retail price. If you're getting a steal, you may also be getting a fake.