Stopwatch

When the TAG Heuer Mikrograph stopwatch was invented in 1916, it allowed the measurement of time with unprecedented accuracy--down to 1/100 second. This precision led to major changes in the sports world, including records such as the world's first sub-4-minute mile by the U.K.'s Roger Bannister (3:59.4, May 6, 1954). Digital stopwatches accurate to 1/1000 second debuted in 1971.