Rolex GMT-Master 1675 'Cornino' Vintage Collection

The Sea-Dweller reference 16600 represents a significant evolution within Rolex's professional dive watch collection, succeeding the reference 16660. It maintained the robust engineering principles of its predecessors while incorporating updated materials and manufacturing techniques. This reference is distinguished by its helium escape valve, a feature essential for saturation divers, allowing trapped gases to escape during decompression without damaging the crystal. It is a tool watch designed for extreme underwater environments, positioned above the Submariner in terms of water resistance and specialized features.

This reference features a 40 mm stainless steel case, providing a substantial yet wearable presence. It is equipped with the self-winding caliber 3135, a chronometer-certified movement known for its reliability and precision, offering a power reserve of approximately 48 hours. The watch utilizes a sapphire crystal, contributing to its enhanced durability and scratch resistance. Its construction ensures a water resistance rating suitable for professional diving applications.

For collectors, the 16600 is notable as the last Sea-Dweller reference to feature a 40mm case and an aluminum bezel insert before the introduction of ceramic bezels and larger case sizes. It appeals to enthusiasts seeking a modern classic with traditional proportions and a robust, purpose-built design. The consistent black dial and steel bracelet across its production run underscore its functional aesthetic.

The GMT-Master reference 16750 represents a transitional period for the model, bridging the gap between the long-running vintage reference 1675 and the modern five-digit references. It introduced significant technical updates while retaining much of the aesthetic character of its predecessor. This reference is notable for incorporating a quickset date function, a crucial advancement for user convenience that was absent in earlier GMT-Master models. It maintained the classic GMT-Master design language, making it appealing to collectors who appreciate both vintage aesthetics and improved functionality.

This reference features a 40 mm stainless steel case, housing the automatic caliber 3075. This movement provides a power reserve of approximately 42 hours and includes the aforementioned quickset date complication. The watch is fitted with an acrylic crystal, consistent with its transitional vintage status, and offers water resistance up to 100 meters. The bidirectional rotating aluminum bezel with a 24-hour graduated insert allows for the tracking of a third time zone.

For collectors, the 16750 is particularly interesting due to its relatively short production run and the combination of vintage and modern features. Early examples often feature matte dials, while later versions transitioned to gloss dials with white gold surrounds for the hour markers, offering distinct variations for enthusiasts. Its position as a transitional reference makes it a key piece in understanding the evolution of the GMT-Master line, appealing to those seeking a watch with both historical significance and enhanced practicality.