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BALL's old ad. Webb C. Ball set up "RR Standard" ("RR" for Rail Road) to assure a high accuracy and perfect reading to all railroad employees. He also created the BALL Time Service, an after-sale service to which every employee of the rails had to bring his watch every two weeks to make sure the accuracy and reliability of the watch was maximal.
Webster Clay Ball. Webster Clay Ball (October 6, 1848 – March 6, 1922) was a jeweler and watchmaker born in Fredericktown, Ohio, who founded the Ball Watch Company.When Standard Time was adopted in 1883, he was the first jeweler to use time signals from the United States Naval Observatory, bringing accurate time to Cleveland.
A railroad chronometer or railroad standard watch is a specialized timepiece that once was crucial for safe and correct operation of trains in many countries. A system of timetable and train order, which relied on highly accurate timekeeping, was used to ensure that two trains could not be on the same stretch of track at the same time.
That is, the watch should not delay at all, and the upper limit is 5 seconds fast in 24 hours. The criterion of resistance to magnetic fields is innovative. Until now, the ISO 764 Horology — Magnetic resistant watches standard defines that an antimagnetic watch must support a magnetic field of 4,800 A/m, which corresponds to 60 gauss. METAS ...
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According to COSC, an officially-certified chronometer is a high-precision watch capable of displaying the seconds and housing a movement that has been tested over several days, in different positions, and at different temperatures, by an official, neutral body (COSC).
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