The Heuer Calculator Chronograph Ref. 110.663 is a specialized tool watch from the 1970s, famously known as the "UFO" due to its massive, 45mm tonneau-shaped case. Launched in 1971–1972, it was designed as a direct competitor to the Breitling Navitimer, offering a complex slide-rule bezel for scientists, pilots, and racing professionals
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About the Brand
Heuer: Picture a race car driver in 1970, and there’s a good chance they’re wearing a Heuer chronograph. The brand is closely associated with motorsport and performance timing, with roots in racing that date back to the 1930s. Known for its bold, sporty designs, Heuer became part of the TAG Group in 1985, forming the brand known today as TAG Heuer. Watches produced under the original Heuer name remain highly desirable and are celebrated for their iconic vintage styling.