Chronograph
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A chronograph is a type of watch which is a stopwatch combined with a standard watch. A basic chronograph has hour and minute hands on the main dial to tell the time, a small seconds hand to tell that
An Omega Speedmaster Professional, which is commonly regarded as one of the most iconic chronographs ever produced
Gallet MultiChron Astronomic (c. 1959) — Complex mechanical chronograph with 12-hour recording capabilities, automatic day, date, month, and moon phase display
Tianjin Sea-Gull ST1901 chronograph movement (based on the Swiss Venus 175)
Miyota caliber 6S21 quartz chronograph movement
Omega Speedmaster
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Omega Speedmaster is a line of luxury chronograph wristwatches produced by Omega SA. While chronographs have existed since the late 1800s, Omega first introduced this line of chronographs in 1957. Sin
Chronograph
…usage of the chronograph was during NASA's Apollo missions to the moon, when each astronaut was equipped with a fully functioning chronograph, the Omega Speedmaster; in one instance, a Bulova chronograph was used. Chronographs are routinely used to record heart beats within hospitals, calculate speed and/or distance…
Vintage Omega Speedmaster ref. 145.012-67
Omega cal. 321 movement
The Speedmaster watches worn by astronauts Walter Schirra (Mercury Sigma 7 mission, 1962), Richard F. Gordon, Jr. (Apollo 12, 1969) and Thomas P. Stafford (Gemini 6, 1965)
Ed White wearing an Omega Speedmaster on EVA during Gemini 4