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Be One of the First to Own the New Oris Big Crown ProPilot Altimeter!
Oris has recently unveiled the new Big Crown ProPilot Altimeter watch - the first of its kind - and a limited quantity will be available exclusively to EAA attendees for purchase ahead of its release to the general public in September!

More than 75 years after Oris made its first pilot's watch, the company is proud to announce the launch of the most innovative pilot's watch in its history - the Oris Big Crown ProPilot Altimeter, the world's first automatic mechanical watch with a mechanical altimeter.

It's the latest in a long line of Oris pilot's watches, stretching back to 1938. Oris has a proud tradition of making accurate, reliable, industrially manufactured and sensibly priced wristwatches, which is why Oris has become the pilot's choice.

The Oris Big Crown ProPilot Altimeter has been developed entirely by Oris to serve as a high-performance instrument for pilots, mountaineers, explorers and research scientists, who work at altitude. Its sturdy 47mm multi-piece stainless steel case houses an Oris automatic movement, and a Swiss mechanical barometric altimeter and barometer movement.

One of the biggest challenges facing Oris engineers was the design of the altimeter hand itself. Making the altimeter
mechanism small enough to fit inside a wristwatch meant the
hand had to be extremely lightweight, but stiff enough to avoid tolerances and therefore inaccurate readings. The solution was to create it from laminated carbon fiber, making the hand seven times lighter, but 10 times stiffer than the average watch hand.

Another challenge was how to protect the inner workings of the
watch from moisture when the altimeter is activated. Oris
patented a new altimeter adjustment and venting crown, which prevents moisture from entering the watch using a membrane made of PTFE, which creates a vapor barrier.

The above mentioned aspects are covered by an Oris patent i.e.
the multi-function adjustment venting crown, the co-axial layout
of the watch and altimeter movements, including a skeletonised movement holder, and the carbon fiber altimeter hand.

How the patented Oris Big Crown ProPilot Altimeter works:
The Oris Big Crown ProPilot Altimeter has two crowns. The
crown at 2 o'clock is a conventional crown to adjust the time and date, and to wind the watch as necessary (the automatic
movement has a 38-hour power reserve).

A second screw-down crown at 4 o'clock operates the altimeter.
When screwed down into 'Position 0', the altimeter is inactive
and the watch is water-resistant to 10 bar. The altimeter is
activated by unscrewing the crown into 'Position 1', indicated by
a red ring.

When the crown is pulled out into 'Position 2', the altimeter can
be calibrated. Once set, the watch shows the current altitude via
the yellow indicator, and the corresponding air pressure via the
red indicator. The altitude scale is around the outer dial ring; it
can measure altitude up to 15,000 feet or 4,500 meters (two models have been produced, one with a scale in feet, one in meters). The air pressure scale is recessed between the altimeter scale and the central dial. Once the altimeter is no longer required, the crown can be returned to Position 0 by screwing it down, resealing the watch case and ensuring it is once again water-resistant to 10 bar.

The Oris Big Crown ProPilot Altimeter: the world's first automatic mechanical altimeter watch developed for ambitious explorers. [ home ]
More: www.oris.ch/en/news/2014/635

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