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The Sky of the North Sea, the Grain of Italy: the Van Speyk Courage Phases de Lune

For a ship to pass over rocks, the sea has to rise. What raises it is not the wind. It is a duty given to a body three hundred and eighty four thousand kilometres away, and that duty has never once been missed.

Hasan Bekmezci · · 11 min read
Van Speyk

Van Speyk

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It was a pitch black night on the North Sea. Every wave that struck the hull sent a groan up through the timbers and into the whistle of the wind. On deck, a young sailor wrapped in an oilskin soaked through with spray turned to the old astronomer beside him. In the thin yellow light of the lantern the astronomer’s hands were shaking with cold as he trained his brass sextant upward, on the silver disc slipping for a moment between the clouds.

The wind is driving us onto the shore, master, the young man shouted. The chart is no use to us.

Without taking his eyes off the sky the astronomer smiled calmly. A chart shows you the ground beneath, my boy, he said. What will take you off this shoal is the sky above it. Look. The Moon is at its brightest and its highest tonight. The sea will not declare war on us. It will lift us and carry us over.

The sailor’s hands were locked on the wheel. He looked from the darkness to the silver dome the astronomer had pointed at. The water boiling over the deck was uncovering the black teeth of the shoal beneath, each one standing up like a dagger.

But master, he said, his voice trembling under the roar of the wind, the water is draining out from under our feet. The keel is about to touch sand.

The old astronomer lowered his sextant slowly into his pocket. In the lantern light a deep conviction was shining in his eyes.

Be patient, young man, he said. Gravity is the quietest and the most faithful word in the universe. Look, the Sun, the Earth and the Moon are aligned at this moment in the darkness of space. Astronomers call it a syzygy. The sky is shaking hands with the sea. In a few minutes that shoal you can see beneath you will be filled in by an invisible hand.

Van Speyk
The white dial on a blue alligator strap. A forty one millimetre steel case with a fully polished body. Photo: Van Speyk

What the astronomer had said began to happen at that exact moment. The angry water of the North Sea stopped receding. The current below reversed, and an enormous mass rose beneath the keel and lifted the boat into the air with a faint crack of timber. As the killing rocks of the shoal disappeared under the climbing level, the ship crossed the narrow passage like a feather drifting in the hand of the sky.

When the young sailor felt the pressure ease at the wheel and the water carry the ship into safe depths, he drew a long breath and raised his eyes. What he felt at that moment was not only the relief of having turned back from the edge of death. It was a spellbound reverence at having personally witnessed that vast gravitational dance between the sky and the ocean.

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"Gravity is the quietest and the most faithful word in the universe. Nobody watches it, nobody speaks of it, and it has never once failed to keep its appointment."

Hasan Bekmezci

What the astronomer knew was this. Beyond the sidereal cycle of twenty seven point three two days in which the Moon completes one full circuit of space, bringing the phases back into the same alignment demands a patience of exactly twenty nine point five three days. The two day gap between those figures exists because we too have travelled around the Sun while the Moon was finishing its lap.

That silver sphere, which shows us the same face forever thanks to millions of years of gravitational locking, filled the shoals of the North Sea with an enormous mass of water that night, floated the ship off the rocks and carried it out to open sea.

This fate of seamanship and astronomy, written in the merciless cold of the north, comes back to life on the dial of the Van Speyk Courage Phases de Lune.

NASA
A full moon. The interval between two of them runs two days longer than the Moon’s own orbit. Photo: NASA/GSFC

The dial has a symmetrical and remarkably balanced layout, and it is offered in three colours: black, blue and silvered white. A fine minute track is printed at the outer edge, and one step inwards sit polished applied markers and numerals. The central hour and minute hands are cut in a leaf shape. All three subdials are snailed.

The moon phase indication at three o’clock opens onto a deep navy ground representing the depth of the night sky, worked with stars and carrying a moon in a golden tone. The curved edge inside the register opens and closes the visible portion of the disc, from crescent to full.

One point has to be corrected here, because most people get it wrong. That curve does not imitate the shadow of the Earth. The Sun lights exactly half the Moon at all times and never any less. The only thing that changes is how much of that lit half we are positioned to see. Shadow enters the story only when our planet passes exactly between the two, and that is called a lunar eclipse. The curve on the dial animates our point of view, not a shadow.

The small seconds at nine runs independently of the central hands and displays the passage of the second. The register at six reports how much power the mainspring is holding, and it is of the retrograde type. The hand travels along an arc, and on reaching the end of that arc it does not complete a circle but jumps back to the beginning. At this price it is not a common solution.

Van Speyk
On the white dial the moon phase opens onto a navy ground strewn with stars, carrying a golden moon. Photo: Hasan Bekmezci

Beneath the indication turns a disc painted with two moons, and its rim carries fifty nine teeth. A small finger on the wheel that turns once every twenty four hours pushes the disc forward by exactly one tooth each day. Because it carries two moons, the disc shows two complete cycles in fifty nine days. In other words the mechanism treats a lunar month as twenty nine and a half days.

The true figure is twenty nine days, twelve hours and forty four minutes. At the close of every month the sky therefore asks for forty four minutes the mechanism can never count. That works out at about a minute and a half a day, and it accumulates. After roughly two years and eight months the display has fallen a full day behind.

That is why the watch carries a corrector. Van Speyk has buried it not in the flank of the case but inside the lower right lug. Press it with a pointed stylus and the disc jumps forward by one day. Putting it in the lug is a visual decision, because it leaves the side of the case without a single hole in it.

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"The wheel counts a month as twenty nine and a half days, and the sky asks for forty four minutes more. Those forty four minutes become a whole day in two years and eight months, and the small hole cut inside the lug is there for exactly that."

Hasan Bekmezci
Van Speyk
All three subdials carry a snailed finish, and the hands are cut in a leaf shape and polished. Photo: Van Speyk

Inside runs the Swiss made STP2-12-63 automatic movement, known for its precision and its durability. It turns on thirty five jewels, beats at twenty eight thousand eight hundred vibrations an hour and offers roughly forty two hours of power when fully wound. The hairspring is Nivaflex, an alloy indifferent to magnetic fields, which is why a watch left beside a telephone speaker or a handbag clasp keeps its rate.

The most important technical feature of the movement is the slipping arrangement inside the barrel. Turn the crown clockwise and the mainspring reaches full tension. Once it does, the flexible steel bridle pressing against the inner wall of the barrel begins to slide. The system entirely prevents the spring from being forced to breaking point and the wheel teeth from being damaged. The soft friction you feel past a certain point when winding by hand is not something breaking; it is that bridle beginning to slip.

The case is forty one millimetres across and fourteen millimetres deep. A domed sapphire crystal covers the dial, and the caseback is sapphire too, showing the movement. The bowl shaped crown carries the house monogram, and the same monogram repeats on the folding clasp and on the rotor. Water resistance is fifty metres.

Van Speyk
The sapphire back reveals the movement, its rotor personalised with the house monogram. Photo: Van Speyk

The element that completes the character of the Courage CSW-BL is not on the dial. It is the strap. Van Speyk uses an authentic Tuscan vegetable tanned leather carrying the signature Handmade in Italy. That is not the ordinary method of the leather industry today. The overwhelming majority of the world’s leather is tanned with chromium salts inside a single day. The method practised for centuries in the valleys of Tuscany takes weeks, and to understand the difference you have to walk into the tannery.

Raw hide arrives salted, because salt is what keeps it from rotting on the journey. The first job is to get that salt out, along with the blood, the dirt and the fat that came with it. The hide rests in baths of natural water for hours and sometimes for days, soaking back towards the softness it once had. This stage is called soaking and it cannot be hurried, because the water entering the hide has to spread evenly between the bundles of fibre.

Liming comes next. The hide goes into pits or drums holding slaked lime and sulphides. What happens there is chemistry: a strongly alkaline bath loosens the bonds between the collagen fibres, the hide swells, and the hair roots soften and let go. The hair is then taken off mechanically, and the layer of fat and flesh on the inner face is scraped away with a blade. At the end of all this the hide sits at an alkalinity of nearly twelve, and no tannin can do its work in that environment. Acid is therefore added to walk the pH slowly back towards neutral, and enzymes clean off the last of the unwanted protein. The fine natural grain of the surface only comes forward because of that enzyme stage.

US National Archives
Unhairing machines. The limed hide passes through here and the loosened hair is taken off mechanically. A tannery of the period, Milwaukee, 1918. Photo: US National Archives

Only now does the tanning itself begin. The hide passes through a series of wooden drums and pits, each holding a slightly stronger liquor than the last. The tannins are plant polyphenols drawn from chestnut and oak bark, sometimes from mimosa and quebracho. Those molecules take hold of the collagen fibre through hydrogen bonds and build a shell around it. The result is permanent: bacteria can no longer digest that fibre, which is to say the leather will not rot. A tanner will show you the difference between raw and tanned hide with a single demonstration. Drop a piece of raw hide into water at around sixty five degrees and within seconds it shrinks and turns to jelly. A piece of vegetable tanned leather comes out of the same water almost untouched. The rise in the shrinkage temperature of collagen is the measurable proof that tanning has actually happened.

US National Archives
The tan yard. Hides move in sequence through pits of steadily stronger tannin liquor. The same tannery of the period. Photo: US National Archives

Passing through that series takes as long as forty days. Chrome tanning does the same job in one and leaves the leather a pale blue. Vegetable tanning allows nobody to hurry, because the tannin molecule is large and needs time to reach the middle of the hide. Force the pace and the surface tans while the core stays raw, and that strap breaks across the middle within a few years.

When the tanning is done the leather is stiff and dry. The stage that gives it back its flex is called fatliquoring. Natural oils are warmed into an emulsion and worked between the fibres, where they stop the fibres drying out and sticking to one another. Dyeing is done with aniline dyes. An aniline dye is transparent and does not seal the pores, so the leather’s own grain keeps showing through. Pigmented finishes, which cover the surface completely, are cheaper and more hard wearing, but they make leather look like plastic.

Drying happens slowly and in open air. Leather dried too fast hardens on the outside, traps moisture within, and cracks in time. Dry leather starts out like a board; it is softened again by gentle beating and staking. Then the craftsman takes over. The strap is cut by hand, its edges filed one by one, dyed and sealed with wax. The stitching is done by hand with waxed thread and two needles. A machine seam runs on a single thread, and when that thread gives anywhere along its length the whole seam unravels. In a hand seam two separate threads lock into each other, and if one breaks the other holds.

Van Speyk
The strap, from Van Speyk’s own accessory range. Blue alligator grained leather on quick release pins. Photo: Van Speyk

What all that labour gives the wrist only appears with time. Vegetable tanned leather darkens as it meets sunlight and the oils of the skin, because the tannins inside it slowly oxidise. That is patina, and it never forms the same way on two straps. Of two straps made on the same day, one turns the colour of honey after six months while the other goes to a deeper tone. The difference is where the two people wearing them live, how much sun they see and how they perspire.

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"Chrome tanning is finished in a day and vegetable tanning takes forty. The difference between them is not chemistry. It is patience."

Hasan Bekmezci
Van Speyk
The profile of the case with the blue alligator grained strap. The body is polished and the lugs brushed matte. Photo: Van Speyk
Van Speyk
The silvered white dial. The case is also offered with yellow and rose gold plating. Photo: Van Speyk

Whoever straps a watch like this on today is neither crossing a shoal nor holding a sextant. The small disc on the right of the dial nevertheless goes on advancing one tooth a day, keeping the same count.

That disc does not visibly move in a day. Look again two weeks later and it is somewhere else entirely. It is the quietest lesson a watch can offer. During the interval when you were certain nothing had changed, everything was patiently moving.

It is also what the astronomer was telling the young sailor. Neither the sea nor we established that order. What fell to us was to learn to read it and to keep its count.

Van Speyk
The watch is delivered with a leather roll, a certificate and a user guide. Photo: Van Speyk

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Category On Our Radar
Author Hasan Bekmezci
Published Eylül 17, 2026
Read Time 11 min read
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