Breitling Navitimer is a brand of luxury watches founded by Leon Breitling in 1884 in a small workshop in the hills of Switzerland. In 1915, Gaston Breitling, his son, having taken over the company after his father passed away, created the watch that the Breitling company would become famous for: the chronograph watch, which he provided to pilots to use as a wrist instrument. Nowadays, Breitling continues to assemble chronometers on its watches with excessive attention to detail and the highest of standards. Unfortunately this means it is often copied by imitators, producing high- and low-grade fakes.
Examine the second hand under a loupe. An authentic Breitling Navitimer second hand will display a perfect Breitling anchor and detailed wings on the end of it. A fake will have an imperfect anchor, carved with less crisp lines and an embossed wings logo that is blurry and smeared.
Examine the logo on the dial. A fake Breitling Navitimer will have a logo applied on the dial that is obviously lower-grade: it will look thin and flimsy and have noticeable white space.
Examine the sub-dials. The sub-dials should have chronograph functions which are in perfect working order. Fake Breitling Navitimer watches will often display calendar functions, which is a red flag for a fake. Furthermore, authentic Breitlings do not have raised sub-dials.
Turn the watch over and look at the back. If it is genuine it will have laser-engravings of the manufacturer's markings.
Look at the pin that holds the hour, minute and second hands. The pin and the hands of the watch should all be the same colour, be it silver or gold. Fakes often have a black pin which contrasts with the hands of the watch.