SHERPA Watches – ULTRADIVE Compressor Black Dial 40mm Stainless Steel Automatic Dive Watch
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The elegant satin finish Compressor Watch
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The Ultradive “Satin” has the same elegant characteristics as the standard Ultradive model, yet features an incredibly smooth satin-matte finish stainless steel case, giving the watch a distinctly well-balanced character.
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In some lights it has a refined, almost ethereal quality caused by the serene interplay of light on the matte metal surfaces and sapphire box crystal.
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The internal diving bezel, operated by the upper crown, features the special dayglow Sherpa Orange Swiss Super-LumiNova Grade X1 that gives this watch a unique look – elegant, but a tool watch at the same time.
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Like its sister model the OPS, it is 20 bar (certified to 200 m) water resistant and features the unique compressor mechanism in the case back and (no screw down) compressor crowns.
The EPSA (super) compressor rediscovered and re-invented
A water-resistant watch with two crowns is a (super) compressor watch, right? Not quite. In a way, this could be true for vintage watches, but in fact, not always. And for today, this is even more doubtful, as nearly all double crown & internal bezel watches just use traditional sealing technology and only look like the watches from the past.
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Our Ultradive and OPS watches are equipped with two crowns. And then some, because the true (super) compressor or bayonet compressor technology goes deeper than the naked eye can see. So, let’s dive in!
The technology behind the super compressor was introduced in the 1950s. At that time, it was not easy to design and build a water-resistant watch, especially for mass production. The sealing materials were not yet as reliable as today, and some materials we use nowadays were not even invented or developed to sufficient quality standards. So, watch brands had to be very inventive to achieve water-resistance. A company that was ahead of its time, was Ervin Piquerez SA, also known as the abbreviation EPSA to watch connoisseurs. The designers and engineers of the company, which was at some point in time the largest manufacturer of watch cases in the world and worked for all the big watch brands, had several groundbreaking ideas during the 1950s and addressed the problem of achieving water tightness in many clever ways.
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The (super) compressor technology
Up till the early 1950s, sealing materials were usually not of the quality and characteristics that were needed to withstand rising water pressure. In many cases, the materials would deform and make the sealing pressure fade over time, resulting in leakages.
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The technicians from EPSA had a brilliant idea how to solve this problem: they invented a case back technology, called ‘compressor’, which would put the sealing under slight pressure in everyday use, resulting in water resistance under normal circumstances and during snorkeling / shallow diving. When diving lower, the rising water pressure further compressed the case back into the case, resulting in a tighter fit.
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This avoided high pressure on the sealing over longer periods of time and meant that the sealing materials would last much longer.
To come up with an idea like that – to use the force that you want to keep out of the watch to increase the sealing pressure and to make the watch more watertight – is the kind of engineering genuineness that still fascinates today. It has a certain Aikido philosophy to it: use the opponent’s force or attack against himself.
Today’s compressor technology at Sherpa Watches
As we are bringing back the most legendary models of the old Sherpa series of watches from the 1960s, we decided to update the ‘EPSA-STOP’ or ‘bayonet compressor’ system. It is improved by using modern sealing materials and higher precision manufacturing, as well as a new design. This allows to only introduce the case back in one orientation and guarantees a perfectly aligned EPSA logo (the iconic diver helmet!) on the case back.
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This new design tightens the case back to the sealing in a way that everyday actions can be performed easily and safely, while tightening the sealing further when exposing the watch to higher pressure from outside. In other words: the Ultradive and OPS will go as far (or deep) as you dare to go, without succumbing under pressure.
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In upcoming articles, I will outline the technology of the MONOFLEX crowns and our use of the internal bezel.
Sherpa Ultradive & bracelet
Elegant steel bracelet Compressor Dive Watch
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Featuring the new stainless steel bracelet custom made for this model, the Ultradive brings an entirely new aesthetic option to the collection.
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The brushed mid-links are flanked by polished outer links, establishing a stylistic bridge with the surface finishes seen on the case and lugs.
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The solid end links are precisely machined to sit snugly between the sculpted lugs of the Ultradive.
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Consequently, the character of the piece is transformed, with the bracelet resulting in a completely different look, feel, and wearing experience.
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The micro-adjustable buckle of the bracelet features a double button release mechanism with the same cross-hatch pattern as the crowns.
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The buckle has a hidden engraving inside, reminding us of the world out there: “May all beings be happy and free”.
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Staying true to the Sherpa attitude, this reminder keeps us fresh and open to the world.
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PRODUCT SPECIFICATIONS
Collection ULTRADIVE
Name: ULTRADIVE Black Dial 40mm Seel
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Reference: 002/01/01
Case
Stainless steel, EPSA-STOP bayonet compressor closing system
Diameter / height
40.0 mm / 13.5 mm, lug to lug 49.3 mm
Water Resistance: 20 bar
200 m according to ISO 6425 [4.7.4] and [4.7.10], certified by DNV
Crowns
Proprietary MONOFLEX compressor crowns (not screw-down), hand made by Sherpa Watches
Crystal
Domed Sapphire box glass, internal anti-reflex coating and inner black metallisation on the outer rim
Dial
Delicately domed dial with applied faceted, diamond cut indices which elegantly play with light reflections, and Swiss Super-LumiNova Grade X1. The lume dots of the indices form a unique diamond shape at night
Hands
Faceted minute and hour hands with diamond cut mirror-like finish, giving fine yet strong reflections, seconds hand with its unique “double lollipop” configuration with two lume dots
Movement
Mantramatic MM01, based on Sellita SW200-1 automatic, premium (Top) range, fine decoration on both sides, gilt finish, custom rotor, 38 hrs power reserve, world’s first and only “spiritual complication” with two micro Tibetan Buddhist prayer wheels
Strap
Material : Polished/brushed steel
The bracelet is made of highly resistant olished/brushed steel
Buckle type :The micro-adjustable buckle of the bracelet features a double button release mechanism
🔴 Price: EUR 6'400 / $ 7,000 (*incl. shipping and customs)
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It’s the heart that ticks
Every timepiece created by Sherpa Watches has a story.
Because every watch is hand built and represents the craftmanship of all the German and Swiss watch makers, case manufacturers, dial creators and mechanical engineers involved. Their love for the iconic watches that explored oceans and conquered Mount Everest in the 1950s reflects in every detail.
We combine the revolutionary watch case designs from the past with modern techniques and the highest quality materials to ensure our watches will stand the test of time.
Sherpa Watches is dedicated to bringing back the most legendary watch models. We relaunch designs that have become true treasures among vintage watch collectors and offer something remarkable for anyone who has yet to discover the Sherpa heritage. Sherpa Watches pays tribute to the achievements of the original Enicar S.A. brand that conquered the watch world during the golden age of tool watches.
And at the same time, we honour the humble Sherpa people that inspired the Swiss pioneers in naming their most ambitious model line from 1956 on.
Iconic design meets state of the art engineering.
Imagination meets perfectionism.
Devotion meets emotion.
It’s not only mechanics that makes Sherpa Watches tick.
It’s a heart.
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Address
Sherpa Watches GmbH
Bommershöfer Weg 41
40670 Meerbusch
Germany🇩🇪
Contact
Tel. +49 2159 8152230 (also WhatsApp)
info@sherpawatches.com
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