Rolex Pre-Explorer 6098 Ovettone Honeycomb DialMaybe the coolest Oyster ever? The Rolex Big Bubbleback watches are known by their Italian nickname Ovettone (big egg) due to the exceptional depth of caseback, which was domed to accommodate the automatic rotor. We love these 36mm steel watches, which are regarded as some of the earliest sports watches. In fact, the reference 6098 is known as the Pre Explorer as it was the watch supplied by Rolex and used on the successful Everest expedition in 1953