Rolex Chronograph "Pre-Daytona" 6238 Silver DialRolex reference 6238, produced between 1962 and 1968, is often dubbed the Pre Daytona. This transitional model bridged the gap between Rolexs earlier chronographslike references 6034 and 6234and what would ultimately become the iconic Daytona line up, first launched with reference 6239 in 1963. Over its six year production run, it's estimated that only around 2,000 to 2,500 examples were made, in both stainless steel and goldmaking the 6238 a rare and