Starting in 1994 plain lugs became de IWC Portofino rigueur one more modern Vacheron Constantin Traditionnelle feature taking the place of a design element associated with the vintage era. The 14270 is a reference that shows the process by which Rolex became the Zenith Chronomaster modern watchmaker it is today. From here on out all 14270s and all Explorers for that matter will feature undrilled lugs.