How a century of engineering shaped the modern wristwatch

Before the wristwatch could become an everyday object, it had to prove it could survive everyday life.

The Oyster Revolution | Rolex


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Rolex

I
N the mid-1920s, the wristwatch was still finding its place.
Pocket
watches remained
the trusted instruments of precision, while wristwatches were smaller, more exposed
and often dismissed as ornamental. Rolex founder Hans Wilsdorf saw not a limitation, but a
challenge to solve through innovation.

Introduced in 1926, the Rolex Oyster was his answer. By improving
protection, reliability and
autonomy, Wilsdorf helped shape the modern wristwatch: a dependable object made to tell
time and keep pace with its wearer. A century later, the Oyster story continues to evolve,
from its original waterproof case to increasingly demanding standards of certification,
precision and durability.

Rolex founder Hans Wilsdorf and early Oyster watch design

 
Components of the 1926 Rolex Oyster case and side profile of the first Oyster watch

From left: Components of the 1926 Rolex Oyster case; a side profile of the
first Oyster watch.

Waterproofness was about trust

The sealed case was the claim, but it still needed proof.
For Wilsdorf, that proof had to
come from the field, not just the laboratory. Waterproofness was a promise of
reliability, and credibility had to be demonstrated in the real world.

That philosophy found its defining moment in 1927, when British swimmer Mercedes
Gleitze
crossed the English Channel wearing a Rolex Oyster. After more than 10 hours in freezing
waters, the watch emerged still working and keeping perfect time.

Mercedes Gleitze wearing a Rolex Oyster during the English Channel crossing in 1927

The feat became a defining demonstration. Wilsdorf marked the occasion with a full-page
advertisement in the Daily Mail; describing the Oyster as “the wonder watch that defies
the elements”. More significantly, it established a principle that still defines Rolex today:
Its
watches should prove themselves under demanding conditions.

Over the decades, the Oyster’s reputation was forged across deserts, oceans, mountains
and skies. British racing motorist Sir Malcolm Campbell wore a Rolex Oyster when he broke
the 300mph (483kmh) land speed barrier in 1935. US Air Force test pilot Chuck Yeager wore
one when he became the first person to break the sound barrier in 1947. These experiences
informed Rolex engineering, turning shocks, pressure changes and temperature shifts into
lessons for the manufacture.

 
Rolex Daily Mail advertisement and Malcolm Campbell Bluebird on Daytona Beach

From left: Wilsdorf marked Gleitze’s English Channel swim with a full-page
advertisement in the Daily Mail; spectators watch Malcolm Compbell’s Bluebird on Daytona
Beach, Florida, in 1935.

That spirit continues through the Rolex family of Testimonees, a lineage
that began with
Gleitze. Figures including tennis icon Roger Federer, actor Leonardo DiCaprio, pianist
Yuja Wang, film directors Martin Scorsese and James Cameron, and marine biologist
Dr Sylvia Earle extend the brand’s association with sport, culture, exploration and
environmental preservation.

 
Rolex Testimonees Martin Scorsese, Leonardo DiCaprio and Roger Federer

Clockwise from left: Rolex Testimonees Martin Scorsese, Leonardo DiCaprio
and Roger Federer.

From sealed case to everyday machine

Although the Oyster solved waterproofness, one
inconvenience remained. Like all watches
of the era, it still required regular manual winding. For an everyday companion, that
dependency was a constraint.

In 1931, Rolex addressed it with the Perpetual rotor – a patented self-winding system
in which
a freely rotating rotor, moved by the wearer’s wrist, continuously wound the mainspring.
The
watch drew energy from being worn, reducing the need for manual winding.

1931 Rolex Oyster Perpetual with Perpetual rotor self-winding system

Together, the sealed Oyster case and Perpetual rotor transformed the
wristwatch into a
more autonomous machine. Wearers no longer had to interact constantly with the watch to
keep it running. Precision improved because the mainspring remained under more consistent
tension, waterproofness was better preserved because the crown needed less handling, and
reliability increased because the watch became more self-sufficient.

Rolex helped lay the foundations for the modern mechanical wristwatch. As the Oyster
evolved into the Oyster Perpetual, the idea of an effortless everyday luxury watch became a
reality. The wider industry would later adopt the free-rotor self-winding system as standard
practice, but Rolex was among the pioneers that refined it into a practical everyday
solution.

An original that continues to evolve

From that first waterproof case came a defining watch
family. The Oyster became the
foundation for models that shaped specific categories: the GMT-Master for travel across
time
zones, the Submariner for underwater exploration, the Cosmograph Daytona for motorsport
and the Yacht-Master for nautical adventures. Each remained rooted in Rolex’s 1926
principles of precision, reliability, robustness and practicality.

Oceanographer Dr Sylvia Earle, Rolex Testimonee

This continuity helps explain the Oyster’s relevance. Over
the decades, its case evolved
through Twinlock and Triplock crown systems that strengthened waterproof integrity under
more demanding conditions. Innovations such as Paraflex shock absorbers, Cerachrom
bezels
and corrosion-resistant Oystersteel advanced its resilience for modern life.

For the Oyster’s 100th anniversary this year, Rolex turns to the Oyster
Perpetual, one of the
clearest expressions of its watchmaking identity. The commemorative Oyster Perpetual 41
is presented in yellow Rolesor, pairing a yellow gold bezel and winding crown with an
Oystersteel case and bracelet – a nod to the case elements of early Oyster watches. On
the
slate dial, the “100 years” inscription replaces “Swiss Made” at 6 o’clock, while the
number
“100” appears on the winding crown. Accents in Rolex’s emblematic green complete the
centenary tribute.

 

The commemorative Oyster Perpetual 41 in yellow Rolesor features a slate
dial engraved with
“100 years”, along with a crown marked with the number “100”.

A legacy moving forward

For the Oyster’s centenary, Rolex is raising the standards it sets for the
watch itself. This
year, its Superlative Chronometer certification expands from four testing criteria to
seven. Precision, waterproofness, self-winding and power reserve are joined by reliability,
sustainability and resistance to magnetism. These criteria now apply across design and
manufacturing. Symbolised by Rolex’s green seal and overseen by internationally recognised
independent Swiss entities, the certification offers a broader measure of each watch.

Rolex is also extending its pursuit of precision through optical atomic clocks, which use
quantum physics to achieve timekeeping accuracy beyond previous standards available to a
watch manufacture. These instruments will contribute to the international framework that
defines coordinated universal time (UTC).

Rolex Superlative Chronometer certification green seal

The arc is telling: The watchmaker that once proved the Oyster’s reliability on a swimmer’s
wrist in the English Channel now calibrates its standards against the systems that govern
modern time. Its legacy rests on a simple principle: A watch must earn trust through
performance, not just heritage.

Wilsdorf once said of the Oyster: “It had the entire future and the whole world open before
it.” A century later, the modern wristwatch still bears the influence of that idea.

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