Many luxury watches, including the Breitling Navitimer, are counterfeited. If you are buying a Navitimer online, you should be cautious if you come across a Navitimer at a low price. Always be careful if you are not buying a Navitimer from a licensed Breitling dealer, who can guarantee the watch's authenticity.
Look closely at the second hand on the Navitimer. An authentic Navitimer has the Breitling "B," which you can see in the company logo, on top of an anchor with the tips of the anchor pointing upwards. Some replica Navitimers will have the tips of the anchor pointing down. Also take note of the quality of the second hand and logo. You may be able to tell that it is a fake by looking at the quality of the materials. A Breitling second hand will have crisp edges and a shiny white gold. A replica second hand might be discoloured or might not shine like an authentic second hand.
Hold a magnifying glass over the dial and look for any wording that blurs or does not seem like sharp lettering. Many fakes will have smeared writing on the dial.
Check if the chronograph dials function properly. Chronograph dials are the smaller dials within the main dial. Expensive Navitimer replicas will have functioning chronograph dials, but not all replicas will. In addition, the second hand should glide smoothly around the dial, because the Navitimer has an automatic movement. Look carefully at the second hand and to notice if it is doing a "tick tock" motion like you would find in a battery powered watch.
Compare the type of chronograph dials on the watch to make sure they are identical to the dials on an authentic Navitimer. Some replica Navitimers will have days of the week and months around the small dials, which an authentic Navitimer does not have. Authentic Navitimers only have numbers around the chronograph dials.
Take the Navitimer to a professional watch shop, if possible, to guarantee that the Navitimer is authentic. A watch worker will be able to open the watch case and inspect the inner workings of the watch and tell you whether or not it is authentic.