Rolex Pre-Explorer Ovettone Ref 6098The 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 and, 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 that led to the launch of the iconic Explorer watch. Our example is in beautiful,