Hublot Arsham Splash, Patek Philippe 6104 Celestial, Lange Tourbillon & Corum $20 Coin Watch

Four exceptional timepieces, each a case study in a different kind of watchmaking ambition. A titanium collaboration shaped by an artist’s obsession with erosion. An astronomical display refined across three Patek Philippe references over two decades. A limited tourbillon inside one of the most important dial layouts in modern horology. And a real gold coin, cut in half, turned into a watch.

Watches in This Video

HublotPatek Philippe
MP-17 Arsham Splash Titanium Watch 917.nj.6909.rx
Titanium · Daniel Arsham collaboration · Mecca 10 movement · Raw matte sapphire crystal
Grand Complications Celestial Rose Gold Watch 6104r-001
44mm · Three-disc astronomical display calibrated to Geneva · Cal. 240 LU CL micro-rotor
A. Lange & SöhneCorum
Lange 1 Tourbillon Rose Gold Watch 704.032
Rose gold · Limited to 250 pieces · Asymmetric Lange One architecture · Flying tourbillon
Twenty Dollar Coin Yellow Gold Watch 5814556
22kt gold coin case · Automatic movement · 18kt yellow gold coin-edge bracelet · Rare bracelet configuration

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Frequently Asked Questions

What is the Hublot MP-07 Arsham Splash?

The Hublot MP-07 Arsham Splash is a collaboration between Hublot and contemporary artist Daniel Arsham. The case is engineered to feel carved rather than machined, with a dial opening that captures the exact moment a water droplet hits a surface — frozen in time. Built in titanium with raw matte sapphire crystal and green oxidation accents, it houses the Mecca 10 movement with a power reserve display. Hublot had already collaborated with Arsham on large-scale installations before this watch, making it a natural evolution of that relationship.

Who is Daniel Arsham and how does his art philosophy shape the Hublot collaboration?

Daniel Arsham is a contemporary artist originally trained in architecture who became focused on erosion, decay, and the subtractive process – removing material to reveal form rather than adding to it. His furniture and sculpture, including chairs and tables that appear to be softening or collapsing, and cast bronze and resin pieces formed from Play-Doh molds, all carry this theme. The Hublot MP-07 translates that exact language into titanium and sapphire: the case feels carved, the sapphire is raw rather than polished, and the green accents reference oxidation, as though the watch has already begun to age.

What is the Patek Philippe 6104 Celestial?

The Patek Philippe 6104 Celestial is an astronomical wristwatch that displays a real-time rendering of the night sky using three stacked sapphire discs – one for the sky, one for the stars, and one for the moon – each rotating at a different speed to recreate actual sky movement as seen from Geneva. The display also shows the moon phase, lunar orbit, date, and the times when the moon and Sirius cross the meridian. The oval on the dial represents the portion of sky visible from Geneva’s latitude. It is powered by the caliber 240 LU CL, part of Patek Philippe’s micro-rotor family.

What is the history behind the Patek Philippe Celestial?

The Celestial concept originated with the Patek Philippe reference 5002 Sky Moon Tourbillon – one of the most complicated watches Patek ever produced. That double-sided watch featured an astronomical display on its caseback. Patek extracted that display and built an entire watch around it, first as the reference 5102 in 2002, then evolved into the 6104 with a larger 44mm case. The rarest 5102 variant is the PR – a two-tone rose gold and platinum version with production generally accepted to be under 100 pieces – which rarely appears in circulation and has become a significant collector piece.

What is the A. Lange & Söhne Tourbillon reference 704.032?

The A. Lange & Söhne Tourbillon reference 704.032 is a limited edition complication built on the architecture of the original Lange One – the asymmetrical dress watch that relaunched the brand in 1994. The rose gold edition was limited to 250 pieces. Rather than redesigning the watch, Lange integrated a tourbillon into the existing layout while preserving all defining elements: the off-center time display, the oversized jumping date inspired by the Semper Opera House clock in Dresden, power reserve, and small seconds. The tourbillon is positioned subtly, respecting the original design rather than dominating it.

Why is A. Lange & Söhne significant in watchmaking history?

A. Lange & Söhne was founded in 1845 in Glashütte, Germany, destroyed after World War II, and nationalized in 1948 – ceasing to exist as a brand for over 40 years. After the fall of the Berlin Wall, Walter Lange and partner Günter Blümlein rebuilt it from nothing. On October 24, 1994, they relaunched inside the Dresden Royal Palace with four watches. The Lange One was the most significant – its asymmetric layout, oversized date, and golden ratio dial geometry broke every convention of dress watch design at the time, immediately repositioning German watchmaking alongside Patek Philippe.

What is the Corum $20 Double Eagle Coin Watch and how is it made?

The Corum $20 Double Eagle Coin Watch is built from a real American $20 Double Eagle gold coin, minted between the mid-1800s and early 1900s in 22-karat gold. Corum physically cuts the coin in half: one half becomes the dial side, the other becomes the caseback, with an ultra-thin movement sandwiched between them. The movement must fit within the original coin’s thickness, which is why these watches are exceptionally slim. The case edge replicates the coin’s original milled edge, keeping the piece reading as a coin from the side.

How is the Corum coin watch different from coin watches by Patek Philippe or Cartier?

Earlier coin watches from Patek Philippe and Cartier were hidden watches – the coin concealed a small dial inside and often functioned as a pocket watch. Corum’s approach in 1964 was fundamentally different: the coin becomes the dial, the case, and the identity of the watch, with no hinge or opening mechanism. This example goes further with a matching 18-karat yellow gold bracelet that continues the coin-edge milling on its sides, making the entire piece read as a continuous gold form rather than a coin on a strap.

Is the Corum $20 Double Eagle Coin Watch with gold bracelet rare?

Corum produced coin watches over a long period, so the concept itself is not rare. However, this specific configuration is. The $20 Double Eagle is the larger and more desirable coin variant. Most examples were produced with straps rather than bracelets. This piece combines the $20 Double Eagle coin, an automatic movement – many earlier versions used quartz – and a full 18-karat yellow gold coin-edge bracelet, a combination that is substantially less common and feels significantly different on the wrist.

Video Transcript
INTRO Welcome to another edition of What’s on My Desk. We have an architectural timepiece, a watch that reminds me of Game of Thrones — my moon and my stars — a very special Lange Tourbillon, and a gold coin watch like no other. HUBLOT MP-07 ARSHAM SPLASH To understand the watch you have to understand how we got here. Daniel Arsham originally wanted to be an architect. Even though it didn’t work out, that way of thinking never left him. Instead of focusing on how things are built, he became obsessed with what happens to them over time. How do they change? How do they erode? How do they collapse? The idea of subtracting material instead of adding defines everything that he does. The case doesn’t feel traditionally engineered — it feels carved, like material was removed until this exact shape was left behind. The splash opening on the dial isn’t just a design detail. It’s meant to capture the exact moment a droplet hits a surface and spreads outward, frozen in time. This language shows up across his objects for living: chairs, tables that look soft and almost melting, like they were in the middle of breaking down. He’s even experimented with Play-Doh to create organic forms before turning them into cast bronze and resin pieces. What you’re seeing here is that same idea translated into titanium and sapphire. Hublot didn’t just partner with an artist. They let him shape the watch itself. Their whole identity is built around the art of fusion — mixing materials, disciplines, ideas. Arsham had already been working with them on large-scale installations before this. The Mecca 10 movement is very structured, very mechanical, almost industrial in its layout — a power reserve display like a machine, not a traditional dial. Wrap it in a case that feels soft and fluid and it becomes a really interesting contrast. The green accents reference oxidation, like the watch has already started to age. The sapphire has a raw matte feel rather than high-polish gloss, which is actually harder to achieve when working with crystal. PATEK PHILIPPE 6104 CELESTIAL — BAGUETTE DIAMOND My personal grail watch is the Patek 5002 Sky Moon Tourbillon — at the time one of the most complicated watches Patek ever made, double-sided, with an actual astronomical display on the back showing the stars, moon phase, and the way the sky moves in real time. Instead of leaving that as a feature of one of the most complicated watches ever made, Patek took it out and built an entire watch around it. That’s where the Celestial comes in. In 2002 they introduced the reference 5102, and the sky display is no longer hidden on the back — it becomes the entire focus of the piece. The 5102 was very niche. Towards the end of production they released the 5102 PR — two-tone rose gold and platinum. Production was extremely limited, generally accepted to be under 100 pieces, and it doesn’t show up in the market regularly. The next step was the 6104. The case became 44mm, it leans more into a modern luxury feel, especially with the baguette bezel version we have here. How is it built? Three sapphire discs stacked on top of each other — one for the sky, one for the stars, one for the moon — each moving at a different speed to recreate actual sky motion. On top of that: moon phase, lunar orbit, date, and the timing when the moon and Sirius cross the meridian. The oval on the dial represents the portion of sky visible from Geneva’s latitude — that’s a very Patek detail. Precise. Intentional. Inside: the caliber 240 LU CL, part of Patek’s micro-rotor family. Thin, reliable, allows the complications on top. A. LANGE & SÖHNE TOURBILLON REF. 704.032 Lange & Söhne was originally founded in 1845 in Glashütte by Ferdinand Adolf Lange, who transformed a mining town into a center for precision watchmaking. After World War II, everything disappeared — the factory was destroyed, the company nationalized in 1948. For more than 40 years, Lange simply did not exist. After the fall of the Berlin Wall, Walter Lange returned, partnered with Günter Blümlein, and set out to rebuild from the ground up. On October 24, 1994, inside the Dresden Royal Palace, they relaunched with four watches: the Lange One, the Saxonia, the Arkade, and the Tourbillon Pour le Mérite. The Lange One changed everything. Every dress watch at the time followed a symmetrical layout. The Lange One was completely different — off-center time display, oversized date, power reserve, small seconds, none of it lined up as expected, but somehow it all worked perfectly. The entire dial is built on the golden ratio. The oversized date was inspired by the five-minute clock at the Semper Opera House in Dresden. The Lange One wasn’t just a new model — it reintroduced German watchmaking to the world and immediately positioned Lange alongside Patek Philippe. This limited edition Lange One Tourbillon in rose gold — 250 pieces. Lange didn’t redesign the watch. They respected it. The asymmetrical layout is still intact. The oversized date is still there. The identity hasn’t changed. They integrated a tourbillon into the architecture in a way that feels like it belongs, not like it was added just to impress. Most tourbillons are front and center at 6 o’clock — the whole point is to show it off. They did it subtly here, in order to respect the original design. It still feels like the first Lange One. CORUM $20 DOUBLE EAGLE COIN WATCH What you’re looking at is not just a watch — it’s an actual piece of history turned into a timepiece. To understand what this is, you have to separate it from what most people think of when they think coin watch. Brands like Patek Philippe and Cartier were already making coin watches decades earlier, but those were hidden watches — you’d open the coin and inside was a small dial. More of a novelty, almost like a secret object. What Corum did in 1964 was completely different. They took a real $20 Double Eagle coin, physically cut it into two halves, and built the watch inside. No hinge, no opening mechanism. The coin itself became the watch. One half becomes the dial side, the other becomes the caseback. In between: an ultra-thin movement sandwiched inside. That’s why these watches are so slim — the entire watch is engineered around the thickness of the coin. The case edge is coin edge — that’s what keeps the watch from looking like a watch with a coin dial. From the side, it still reads like a coin. This specific watch takes it further with an 18-karat yellow gold bracelet. They took the coin edge from the coin and translated it onto the sides of the bracelet. The bracelet doesn’t interrupt the design — it continues it. Same color, same material, same weight, same coin edge on the sides of the bracelet. It becomes a continuous gold form. The $20 Double Eagle was minted from the mid-1800s into the early 1900s — 22-karat gold, Liberty on one side, eagle on the other. When you’re wearing this, you’re not just wearing a gold watch. You’re wearing something that started as currency, was taken out of circulation, became a collectible, and was then turned into a watch. Corum made coin watches for a long time, so the idea itself isn’t rare. But this specific configuration — $20 Double Eagle coin, automatic movement, full 18-karat yellow gold bracelet — bracelet versions like this are far less common and feel very different on the wrist. What makes this watch interesting is the concept. You took something that was literally money and turned it into time.