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U-Boat Capsoil Darkmoon Kama SS Quartz Watch
Colour: Grey
· Ref: 3338
£1,350
VAT incl. · Free express delivery
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Colour: Grey
Authenticity
Authorized U-Boat dealer
Warranty
Official U-Boat warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Overview
U-Boat Capsoil Darkmoon Kama Quartz Watch with Grey Dial.
In the Capsoil line, the case is filled entirely with low-viscosity oil, so the dial is read through the fluid bath under a compensation bubble that absorbs thermal expansion between 0 and 60 °C. The Capsoil Darkmoon Kama sets a purple and black photochromic filter over a brushed soleil dial in bare steel. The stainless steel case measures 46.5 mm in diameter.
A Swiss Ronda 762 quartz movement operates submerged in the oil, sealed beneath a domed sapphire crystal. The crown screws down, while a Locking Ring System in 316L steel provides access to the battery without requiring factory intervention. The applied U-shaped hour marker is treated with Super-LumiNova, and the case back is laser-engraved with a QR code.
The dial is in brushed soleil metal under a purple and black photochromic filter, presented in gray, and the hands are treated with Superluminova for legibility in the dark. It is delivered on a calfskin leather strap, secured by a 316L stainless steel buckle.
At a glance
- Case filled with oil
- Photochromic filter over the dial
- Sunray-brushed dial
- Swiss Ronda 762 quartz calibre
- Domed sapphire crystal
- Superluminova on hands
- Screw-down case back
Specs
Movement
Type
Quartz
Calibre
Ronda 762
Case
Material
Stainless steel
Diameter
46.5 mm
Crystal
Domed sapphire
Case back
Screw-down
Dial
Color
Grey
Lume
Hands
Lume material
Superluminova
Water resistance
Rating
5 atm
Strap
Material
Leather
Color
Black
Clasp
Type
Buckle
General
Gender
Men
Country of manufacture
Italy
Questions & Answers
What is the oil inside the case for?
It fills the space between the dial and the crystal. Light travels through the oil at close to the same speed as through the crystal, so the reflection falls away and the hands read as if they sat on the surface. An air bubble takes up the change in volume as the temperature moves.
Where does the U-Boat design come from?
From a drawing Ilvo Fontana made in 1942 for the Italian naval military forces, a diving watch that remained on paper. His grandson Italo Fontana revived it in Lucca and founded U-Boat on its proportions and on the crown set on the left side of the case.
What does the photochromic filter do?
It is a layer over the dial that darkens as ultraviolet light reaches it and clears again indoors, the same chemistry as a pair of reactive eyeglass lenses. The dial seen at a desk and the dial seen in the street are different faces of the same watch.
How does a 46.5 mm case sit on the wrist?
It is a large watch and it is built to read as one. Compare the figure against a watch you already own before you order, because the diameter is what decides this and it is the measurement a photograph flattens. A loose cuff will pass over it.
How long does the Super-LumiNova glow last?
It is a phosphorescent pigment, so it charges from daylight or a lamp and gives its brightest reading in the first minutes. It fades over the hours that follow and takes a fresh charge every time it meets light again.
Still have questions?
Talk to a specialist
Verified Reviews
FAQ
Yes, we are an Official U-Boat Authorised Dealer, and an authorised dealer for every brand we carry.
With over 15 years in the luxury market, we guarantee the authenticity and quality of every piece we sell.
Your order arrives brand new in its original U-Boat packaging, with all official documentation and the U-Boat warranty card, stamped and dated by us.
The warranty covers manufacturing defects. It doesn't cover normal wear and tear or accidental damage — and on watches, it doesn't cover straps, bracelets, or batteries.
Questions about a specific piece? Our specialists are happy to help. [Contact our team →]
Questions about a specific piece? Our specialists are happy to help.
Yes — free DHL Express shipping on all UK orders of £400 or more.
- Orders from £150 to £399.99 ship DHL Express for a flat £9.90
- Orders under £150 ship DHL Express for a flat £19.90
Every order ships with a tracking number, so you can follow your package every step of the way. Shipments are fully insured and delivered by DHL Express with signature required.
Most in-stock orders arrive within 1-2 working days of dispatch.
No — the price you see at checkout is the price you pay.
Our prices include VAT, and nothing is added beyond the delivery charge shown.
DHL will never ask you for a payment on delivery, and no surprise invoice arrives afterward.
No handling charges, no processing fees, nothing added at the door.
We accept all major credit and debit cards, Apple Pay, Google Pay, PayPal, and bank transfer.
- Credit and debit cards — Visa, Mastercard, American Express
- Apple Pay and Google Pay — one-tap checkout, nothing to type
- PayPal — with PayPal Buyer Protection on every purchase
- Bank transfer — often the preference on higher-value orders
Every transaction is fully encrypted, and we never store your card details.
Paying in instalments. Choose PayPal at checkout and you may be offered the option to spread the cost, including interest-free plans on qualifying orders. Plans, terms and eligibility are set by PayPal and shown before you confirm, with no obligation.
Paying by wire, or buying more than one piece? [Contact our team →] and we'll take care of you personally.
You'll find availability on every product page, right above the Add to Cart button. Here's what each status means:
"Dispatched next working day" or "Only 1 left" — the piece is in our warehouse and leaves the working day after you order.
"Dispatched within X working days" — the piece is held at our secondary warehouse. We allow a few days to inspect and authenticate it before dispatch.
"Check delivery date" — the piece is available to order, but we confirm the exact date with the brand. As soon as you order, we contact the manufacturer and email you an estimated date.
Need something by a specific date? Tell us and we'll check before you buy. [Contact our team →]
You have 30 days from delivery to return your order.
How returns work. Just let us know and we'll email you a prepaid DHL Express return label — you never have to arrange a shipment or pay anything up front. The return cost is deducted from your refund. If the piece arrived damaged or wasn't what you ordered, the return is on us.
Your refund options.
- Credit (issued as a gift card) — processed almost immediately once your return reaches us
- Refund to your original payment method — typically 5–10 working days, depending on your bank
To qualify for a full refund, the piece must:
- Be unused and in perfect condition, with no signs of wear
- Include its original packaging and outer box
- Include all original documentation, accessories, and the warranty card
- Not be engraved or personalised — custom pieces are made to order and can't be returned
Not sure whether something qualifies? Ask us before you ship it back — we'll tell you straight. Contact our team.
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Still have questions?
Our specialists are here before and after you buy — no pressure, no obligation. Authorised dealer, official warranty, and guaranteed authenticity on every piece.
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