The story of the Rolex GMT starts with an increase in the number of transatlantic flights enabled by the jet engine, and reaches its zenith thanks to a partnership with one of the most successful airline companies of the mid-20th century. The venerable Pan-American Airlines was looking for an extremely reliable tool watch that would allow its pilots to keep track of two different time zones. Rolex created an ingenious solution, using the rotating Bakelite bezel that worked in conjunction with a fourth, 24-hour hand permitting the wearer to clearly keep track of two time zones.

Instantly recognisable because of its colorful bezel, Rolex’s first GMT-Master was produced for only five short years before the brand addressed the fragility of a Bakelite bezel.

The present reference 6542 is a wonderful example of this seminal GMT-Master model. The glossy black lacquer dial has developed a golden sheen and tropical appearance over the years due to UV exposure which balances well with the well-preserved gilt minute track and gilt printing. The case retains crisp, architectural facets and lovely original dimensions.

Even more impressive is the presence of the Serpico y Laino signature at 6 o'clock. Even the caseback retains the S&L engraving - a detail that would have been removed with continuous polishing. The present watch is one of a handful of correct examples with the signature of the storied retailer on the dial.

Caracas-based, Venezuelan retailer Serpico & Laino began its history in the 1930s, a result of the partnership of two Italian immigrants to Venezuela, Vincenzo Laino and Leopoldo Serpico. While Serpico was the industrial power behind the brand, Laino was the connossieur, having previously been a goldsmith in his native Basilicata. It was Laino, with Serpico’s encouragement, who negotiated first a partnership with Rolex.