It is impossible to think of the aviation chronograph's history without Breitling Replica Watches iconic Navitimer, whose name is a contraction of navigation and timer.With the Navitimer, Breitling Replica Watches bred the ultimate in aviation functionality. Not only did Breitling work with its partners to develop the first automatic chronograph in 1969, but Breitling engineered the look and function of the modern chronograph: first with the side one-button in 1915, refined in 1923, and then with the side two-button in 1934, which separated start/stop and reset functions. Their first replica watch to sport a circular slide rule was the Chronomat in 1940, but the 1952 Breitling Replica Watches Navitimer provided a slide rule that was able to perform all aviation calculations. A new era began, and Breitling held dominance in the cockpit throughout the fifties. Today, the copy watches Navitimer boasts being the oldest mechanical chronograph in current production and continues serving as a 'wrist instrument". Because of the circular slide rule, the Navitimer became a co-pilot in addition to being a replica watch. The pilot could use his Navitimer to calculate ground speed, kilometers (or miles) per minute, fuel consumption, rate of climb or descent, and distance required for climb or descent. He was able to multiply, divide and convert statute miles, nautical miles and kilometers. Once on the ground, the pilot could then determine exchange rates all with just his Navitimer.How does the slide rule work? Using the formula: rate x time = distance, let us consider ground speed. If the pilot knows his time and distance, he can find the variable of ground speed. If he has flown 104 km (or miles) in 35 minutes, he can position the 10.4 on the outer scale next to the number 35 on the inner scale. The answer of 178 km/mph (17.8) appears above the MPH arrow mark at the top of the dial.Naval aviators will appreciate the traditional anchor at the bottom of the red central seconds hand, and all pilots or pilots at heart will admire the exclusive shade of blue, recalling high altitude flight. What you do not see on the copy watches wrist is the Caliber 01 in-house movement, but turn the replica watch over and look through the transparent caseback to see yet another Breitling advance.Produced with state-of-the-art assembly, the Caliber 01 has the axiomatic column wheel with a vertical coupling clutch to ensure a smooth engagement. This certified chronometer chronograph (COSC) has a 70-hour power reserve. The Breitling Navitimer Blue Sky Replica comes in a 43mm case with the model number engraved Flieger-style on the case side at 9 o'clock and can be bought with either a sleek, matching blue alligator leather strap with white stitching or the familiar stainless steel bracelet.Movement specifications: Breitling Caliber 01, COSC chronometer-certified (like all Breitling replica watches), automatic winding, frequency 28.800 vibrations per hour, 47 jewels,copy watches more then 70 hours power reserve.