The Rolex Cosmograph Daytona means many different things to many different people, but one of the most common reactions to a watch is frustration, at least if you're talking about the steel-to-steel reference 116500LN. It’s a story that goes back decades, all the way back to 1963, when the first Cosmograph chronograph was introduced. The first cosmometer, ref. The 6239, wasn't an instant hit for Rolex - in fact, it didn't sell well at first. While chronographs had become an increasingly important watch category for the company in its portfolio in the 1960s, the Cosmograph certainly wasn't the ball beauty it is today, if not the ugly duckling among the swans.