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The Journal

HISTORY OF IWC PILOT’S WATCHES

HISTORY OF IWC PILOT’S WATCHES
Read Time: 4 min

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Vintage IWC Pilot´s Watch with black dial, stainless steel case and brown leather strap

Pilot’s watches are the beating heart of IWC Schaffhausen. Trusted by aviators for generations, they are precise, durable, and built to endure the harshest flight conditions. More than mere instruments, they have become the epitome of the tool watch – indispensable both in the air and on land. This page highlights the origins of IWC’s Pilot’s Watches, timepieces that have set the benchmark for aviation watches. Iconic models like the Mark 11, the Big Pilot’s Watch, and the Special Pilot’s Watch define the classic pilot’s watch with their clear-cut design, outstanding technology, and innovative materials.

 

Uncover the origins of the ultimate tool watch.

IWC Special Pilot’s Watch” Ref. IW436 with black dial, silver case and black leather strap

— IWC’s first Pilot’s Watch, built in 1936, featured shatterproof glass, a rotating bezel, an antimagnetic escapement, and luminescent hands and numerals

SURVIVAL GEAR

Tailored for the extreme demands of aviation, IWC introduced its first-ever pilot’s watch, the Special Pilot’s Watch (Ref. IW436), in 1936. At a time when pilots had no GPS or fuel gauges, they relied on their watches to not only navigate, but also to estimate fuel consumption. Precise and reliable timekeeping was a matter of life or death.

 

IWC answered the call with a pilot’s watch featuring a rotating bezel to track take-off times, and an antimagnetic escapement to ensure accuracy under even the most intense flight conditions. Built to withstand brutal temperature swings from -40°C to 40°C (-40°F to 104°F) and high forces of acceleration, it was a survival tool.

 

THE HOMBERGER LEGACY

The driving forces behind IWC’s first Special Pilot’s Watch were Hans Ernst and Rudolf Homberger, the sons of IWC owner Ernst Homberger. Both were trained pilots, and their experience directly shaped the development of the watch, ensuring it met the rigorous demands of the air.

 

The result was a timepiece that set a new benchmark for durability, precision, and functionality in aviation. The Special Pilot’s Watch quickly became a trusted tool, embodying IWC’s pioneering spirit and establishing its legacy in the world of aviation.

— Sports pilots in the 1930s, Rudolf Homberger (pictured) and his older brother, Hans Ernst Homberger, likely convinced their father to manufacture a “Special Watch for Pilots”. Source: George Fischer Archive

— Rudolf Homberger. Source: Georg Fischer Archive

PASSIONATE PILOTS AND SPORTSMEN

The Homberger brothers, educated in England, embraced the lifestyle of British gentlemen. Passionate about flying and sports, they won rowing trophies across Europe. In 1936, Hans Ernst Homberger received his Swiss pilot’s license—the same year IWC launched its first “Special Watch for Pilots.” This connection between the Homberger family and aviation is a key reason IWC ventured into pilot’s watches.

Hans Ernst Homberger’s Swiss pilot’s license

— Nel 1936 Hans Ernst Homberger ottenne il brevetto di pilota svizzero, lo stesso anno in cui IWC lanciò il suo orologio speciale per piloti.

black and white image showing the Homberger Brothers and other people on a kayak

— Rowing Champions: The Homberger Brothers after a Victory in Zurich, celebrated athletes and silver medalists in international competition 

WHY THE OVERSIZED CROWN?

When it comes to pilot’s watches, bigger can sometimes be better. The Big Pilot’s Watch Caliber 52 T.S.C. (Ref. IW431) embodies that philosophy, inspiring the design of many IWC watches over half a century later.

 

Designed for Astro navigation the Big Pilot’s Watch’s minimalist dial is crafted for swift readability, enabling navigators of the airplane to check the time without losing focus. The long calf leather strap secured by rivets was designed for practicality, allowing it to fit comfortably over bulky flight suits. As for the oversized crown, navigators wore quilted flight gloves to keep warm in freezing cockpits, which made watch adjustments challenging. The oversized crown ensured easy operation. With only 1,000 pieces produced, the Big Pilot’s Watch is now a highly sought-after collector’s item.

 

Discover more here about recent models of the Big Pilot’s Watch.

IWC Big Pilot’s Watch Calibre 52 T.S.C. with black dial, silver case and brown leather strap

— Launched in the 1940s, the Big Pilot’s Watch features an impressive 55-millimeter case and weighs 183 grams

The IWC Mark 11 with black dial and grey textile strap

— The IWC Mark 11, launched in 1948, was crafted for RAF navigators, featuring a Cal. 89 movement that protected against magnetic fields. It served airborne personnel until the early 1980s. 

Mark 11 with 36 mm case, black dial and black leather strap

THE BRIEF: ROBUST, LEGIBLE, ANTIMAGNETIC

IWC made its mark with pilot’s watches for the British Royal Air Force, easily recognized by the Broad Arrow applied on the dial. Exclusively worn in service to the English Crown, these timepieces were the first watches featuring a soft-iron inner case to protect the movement against magnetic fields that could skew accuracy or even stop the watch altogether.

 

The Mark 11 was launched in 1948 and became a benchmark for military precision. It was a design icon, inspiring civilian watches and future models. The RAF requested highly precise waterproof watches with protection against magnetic fields.

 

With a compact 36-mm case, the Mark 11 featured the smaller caliber 89 12’’’, H4,2 handwound movement, while retaining the matte black dial and bold Arabic numerals. Its soft-iron inner cage ensured resilience against magnetic fields in the cockpit – a must for the RAF. For three decades, British navigators relied on the Mark 11, which eventually adorned the wrists of navigators from Commonwealth countries like Australia, New Zealand, and South Africa.

 

Discover the origins of the Mark and tips on buying a vintage Mark 11 in the IWC Journal.