Rolex Big Bubbleback Ovettone Rare Reference 5028The earliest Ovettone with a deep story The Rolex Big Bubbleback story begins in the mid 1940s, when Rolex experimented with some oversized watches that were tested in the market and have become very collectible in recent years. The Italian term for these watches is Ovettone, as they have very deep, round casebacks that resemble an egg or big egg as per the translation! Reference 5028 is one such watch and it features the small Brevet winding crown