wound. Over the period from 1935 through the early 1940s, Heuer manufactured chronographs for pilots in the Luftwaffe, known as "Flieger" (pilot) chronographs. The earlier version featured a hinged-back case and one pusher (for start/stop/reset); the later version had a snap-back case and added a second pusher (for time-in and time-out). All these Flieger chronographs had two-registers, with a capacity of 30 minutes." In the mid-1940s, Heuer expanded its line of chronographs to include two- and three-register models and a three-register chronograph that had a full calendar function (day/date/month). As the highest development of Heuer's chronographs, these "triple calendar" chronographs came in stainless steel and 14, 18, and 22 karat gold cases. Dial colors were white, black, or copper. 1950s In the early-1950s, Heuer produced watches for the American retailer Abercrombie & Fitch. The "Seafarer" and "Auto-Graph" were chronographs produced by Heuer to be sold by Abercrombie & Fitch. The "Seafarers" had special dials—with blue, green, and yellow patterns—that showed the high and low tides. This dial could also be used to track the phases of the moon. Heuer produced a version of the "Seafarer" for sale under the Heuer name, with this model called the "Mareographe". Heuer produced the "Auto-Graph" in 1953 and 1954, which featured a tachymeter scale on the dial and a hand that could be preset to a specific point on the scale. This complication allowed a rally driver or navigator to determine whether the car achieved the desired pace over a measured mile. Advertisements and literature also pointed out that this hand could be rotated to count golf scores or other events. Auto dashboard timers From 1911, Heuer manufactured timepieces to be mounted on the dashboards of automobiles, aircraft, and boats. These clocks and timers included a variety of models designed to address the specific needs of racers and rallyists. In 1958, Heuer introduced a new line of dashboard timepieces, which included the Master Time (8-day clock), the Monte Carlo (12-hour stopwatch), the Super Autavia (full chronograph), Sebring (60-minute, split-second timer), and Auto-Rallye (60-minute stopwatch). Heuer continued to manufacture these dashboard timepieces into the 1980s when Heuer discontinued them. Heuer also introduced timing devices for ski and motor racing events, including Formula One. 1960s From the 1950s to the 1970s, Heuers were popular watches among automobile racers, both professionals and amateurs. Heuer was a leading producer of stopwatches and timing equipment, based on the volume