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Patented proprietary 124-pieces module on ETA 2824-2 caliber
ZENITH PILOT AUTOMATIC
ZENITH CHRONOMASTER SPORT AARON RODGERS
Date indication at 4:30 o'clock
stainless steel back
OW P-104 SELECTRON Band color:STAINLESS STEEL BRACELET Patented proprietary 124-pieces module onYou may never have used a slide rule. Since the advent of the electronic calculator, few people have. However, before the 70s, slide rules were used for everyday arithmetic, such as calculating ratios, percentages, unit conversions, multiplication, and division. From the mid century, wristwatches with miniature slide rule scales were used by scientists, engineers, and pilots to calculate things like fuel consumption, airspeed, ground speed, and the
