Chuck Maddox wrote a very entertaining post at his watch blog, I love this part:
All a Tachymetre bezel is a scale that divides the 3600 (the number of minutes (60) times the number of seconds (60) = 3,600) by the number of seconds to generate a “Units per Hour” indication. The number would be the same if measuring Kilometre’s, miles, or furlongs. Why anyone would do a conversion when one is not necessary is confounding.
I think it was added coz NASCAR fans are dumb, LOL!
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