You are bidding on an extraordinarily rare and complete original documentation set for a 1958-59 Rolex GMT-Master Reference 6542 - one of the most historically significant and collectible vintage Rolex references ever produced. This is a papers-only lot; no watch is included.

THE DOCUMENTS

This set consists of five period-correct, matched documents, all bearing consistent case and movement numbers, confirming this is a coherent, authentic set belonging to a single watch:

• Bureaux Suisses de Contrôle Officiel de la Marche des Montres - Official Watch Rate Certificate (Bulletin de Marche / Gangschein), dated 12 November 1958, issued at Le Sentier, Switzerland. Stamped "Especially Good Results" (Résultats particulièrement bons). References ref. 6542, case serial s/427354, movement numbers 727499 and 2/n 830670, caliber Chronomètre, escapement ancre, Breguet auto-compensateur hairspring, non-magnétique balance, movement diameter 28.5mm, thickness 5.85mm. Issued to Montres Rolex S.A., Bienne-Genève, signed by Le Directeur.

• Original GMT-Master Guarantee Card - issued by The Rolex Watch Company Limited, purchased from Manufacturer Geneva, dated 13 May 1959. References case number 427354 and movement number 860670. Guarantees the dependable functioning of the watch for one year.

• Rolex Watch Company Limited Re-Inspection Certificate - dated 13 May 1959, Geneva. Certifies the chronometer was once more thoroughly checked in Rolex workshops and found to be in accordance with its certificate. Signed by Rolex Watch Company Limited.

• Rolex Chronometer Certificate - issued by Rolex Watch Co., Geneva, bearing the facsimile signature of H. Wilsdorf, Founder and Chairman. References case number 427354 and movement numbers 727499/830670. Certifies the watch has been submitted to a Swiss Institute for Official Timekeeping Tests and awarded the Official Timing Certificate with the right to the title Officially Certified Chronometer.

• Original 1958 Rolex GMT-Master Ref. 6542 Marketing Booklet - copyright Montres Rolex S.A. 1958. Titled "THE GMT-MASTER - A ROLEX RED SEAL CHRONOMETER OF EXCEPTIONAL ACCURACY." Features period photography, full specifications, and original copy describing the GMT-Master as "created for pilots, ships' captains, navigators, travellers and members of the Armed Forces." Includes the iconic Red Seal imagery and references Ref. 6542 throughout. An exceptionally rare survivor of period Rolex marketing literature.

THE REFERENCE 6542 - HISTORICAL SIGNIFICANCE

The Rolex GMT-Master Reference 6542 is the original GMT-Master - the first model ever produced by Rolex in this iconic line, introduced in 1954 in direct collaboration with Pan American World Airways for use by their transatlantic flight crews. It was developed to allow pilots to simultaneously read the time in two time zones using a revolutionary rotating 24-hour bezel and a dedicated fourth hand. It became the official timepiece of Pan Am Airlines and is today considered one of the most historically important tool watches ever made.

The 6542 was produced in very limited numbers from approximately 1954 to 1959, with only around 2,500 to 3,000 examples believed to have been manufactured. A Rolex document dated December 1959 confirms only 605 examples were imported into the United States across the entire production run. The reference is immediately identifiable by its absence of crown guards - the only GMT-Master ever produced without them - and its iconic bakelite bezel insert in red and blue, which was later recalled due to fragility, making intact original bakelite examples extraordinarily rare today.

Complete steel examples regularly sell at major auction houses including Phillips, Christie's, and Sotheby's for USD $35,000 to $120,000+, with exceptional examples exceeding USD $150,000. A yellow gold 6542 set a reference record of CHF 341,000 (approximately USD $350,000) at Phillips Geneva Watch Auction THREE in May 2016.

THE SERIAL NUMBER AND DATING

Case number 427354 places manufacture firmly in the fourth quarter of 1958 - the case back would be stamped IV.1958 - consistent with other documented 6542 examples in the 427xxx serial range. The Bureaux Suisses rate certificate dated 12 November 1958 confirms the movement was tested and certified in late 1958, and the guarantee card dated 13 May 1959 confirms retail sale approximately six months later. This timeline is entirely consistent with known 6542 production and retail practice of the period, where watches were manufactured, tested, and held in Rolex inventory before sale.

All five documents bear consistent case and movement numbers, confirming this is a matched, period-correct set belonging to a single watch - case 427354.

THE BUREAUX SUISSES CERTIFICATE - WHY IT MATTERS

The Bureaux Suisses de Contrôle Officiel de la Marche des Montres was the direct institutional predecessor of the modern COSC (Contrôle Officiel Suisse des Chronomètres), established between 1877 and 1956 across multiple Swiss cantons. In 1973 the regional bureaus were unified under the COSC as we know it today. The Bureaux Suisses certificate in this set is the 1958 equivalent of a COSC chronometer certification - an official, independent Swiss government timing bureau confirming this movement met the rigorous standards required to carry the title of chronometer.

The "Especially Good Results" (Résultats particulièrement bons) stamp is particularly significant. In the late 1950s Hans Wilsdorf personally drove Rolex toward obtaining these superior-grade certifications across their entire production. In January 1959 Wilsdorf wrote that Rolex had reached a point requiring all their bulletins to carry the "with mention" designation, stating "this is how the prestige of Rolex will increase." The certificate in this set, dated November 1958, is a direct product of that quality campaign - and a rare surviving example of the original pre-COSC Swiss timing certification.

Original Bureaux Suisses rate certificates are among the scarcest surviving vintage Rolex documents. Rolex phased them out around 1970 in favour of in-house printed certificates, meaning examples from the 1950s are genuine time-capsule survivors.

THE MARKETING BOOKLET - RARITY AND CONTEXT

Model-specific marketing literature from 1950s Rolex sport watches was routinely discarded at point of sale and is today among the rarest surviving Rolex ephemera. A GMT-Master ref. 6542 specific booklet in any condition is described by specialists as very, very unusual and rare. This example is copyright dated 1958, making it entirely contemporary with the watch it accompanied, and features the original Red Seal branding, period photography of the ref. 6542, and the full original marketing copy targeting pilots, navigators, and military personnel.

PROVENANCE

This documentation set was acquired from the estate of a watchmaker in Ontario, Canada, sold at auction alongside a period vintage Rolex red presentation box and other Rolex items although not the watch matching these documents. The set has been handled minimally since acquisition. Following purchase, the documents were submitted for review to Doug Escribano, SVP International Senior Specialist at Phillips in Association with Bacs & Russo, New York, who reviewed the file and referred the set to specialist horological auction house Jones & Horan of New Hampshire for further assessment.

WHAT THIS SET MEANS TO A COLLECTOR

For a collector who owns Rolex GMT-Master ref. 6542 case number 427354, this is the matched original documentation set for your specific watch - an essentially irreplaceable find. For a serious Rolex historian or document collector, this is a complete, matched, five-piece set representing the full paper trail of a single 1958-59 GMT-Master from the testing bench in Le Sentier, Switzerland, through to the Geneva showroom in May 1959 - a journey of six months across 67 years of history.

Complete matching-number paper sets for the ref. 6542 are missing from the overwhelming majority of surviving examples. To find all five documents intact, consistent, and together is genuinely extraordinary.

CONDITION

All five documents show age-appropriate patina consistent with 67-year-old paper. Fold lines present on the larger documents. No tears, no missing sections, no water damage. Booklet intact with light wear to covers. All serial numbers and text fully legible across all pieces. Documents have been handled minimally since acquisition.

SHIPPING

Ships from Whitby, Ontario, Canada. Will ship internationally - at sellers expense. All shipments fully insured with signature required on delivery.

Sold as-is. No returns.