One hundred years ago, in 1914, the Kew Observatory in Great Britain granted a "Class A" chronometer certificate to a wristwatch for the very first time. This was a major achievement for the timepiece in question, a tiny Rolex watch, and it also marked the advent of the modern precision wristwatch. Discover 100 Years of Rolex Chronometers and Rolex Oyster Watches with this e-book.