Authorized U-Boat Retailer

U-Boat Capsoil Darkmoon 44 IPB Quartz Watch

Color: Black  · Ref: 8464/A
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Color: Black
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Authenticity
Authorized U-Boat dealer
Warranty
Official U-Boat warranty
Shipping
Free · DHL Express
Returns
30 days from delivery

Overview

U-Boat Darkmoon Black 44 PVD surrounds its black dial with oil, giving the display depth beneath a domed sapphire crystal in a 44 mm case.

Seen through oil, the black metal dial has a depth that makes the sapphire crystal above it appear almost absent. Super-LumiNova marks the hands and hour markers, glowing in low light after exposure to a light source.

The oil surrounds the dial and the Swiss Ronda 712.3 quartz movement. A visible air bubble moves as the watch changes position, leaving room for the oil to expand or contract with temperature. The 44 mm case is made of 316L stainless steel with a black PVD finish. Domed sapphire covers the display, and the screw-down crown with its double security system sits on the left. The Locking Ring System on the back provides access for battery replacement.

The black vulcanized rubber strap bears a raised U-Boat logo and measures 22 mm at the watch, fastening with a steel pin buckle finished in black PVD. Water resistance is rated at 5 atm. When the watch is off your wrist, U-Boat specifies a temperature range of 0–60 °C.

At a glance
  • Case filled with oil
  • Swiss Ronda 712.3 quartz caliber
  • Domed sapphire crystal
  • Super-LumiNova on hands and indices
  • Screw-down case back
  • 22 mm lug width

Specs

Type
Quartz
Diameter
44 mm
Crystal
Domed sapphire
Rating
5 atm
Type
Buckle
Country of manufacture
Italy
Movement
Type Quartz
Calibre Ronda 712.3
Case
Material 316L stainless steel
Diameter 44 mm
Crystal Domed sapphire
Crown Screw-down crown
Case back Screw-down
Finish Black PVD
Dial
Color Black
Lume Hands and indices
Lume material Super-LumiNova
Water resistance
Rating 5 atm
Strap
Material Rubber
Color Black
Width 22 mm
Clasp
Type Buckle
Material Stainless Steel
General
Country of manufacture Italy
Recommended temperature off wrist 0–60 °C

Questions & Answers

Why does a bubble move across the dial?

The bubble is an intentional part of the oil-filled construction. It leaves room for the oil to change volume with temperature and moves as the watch changes position.

How are battery replacement and oil servicing handled?

The Locking Ring System has a compartment for battery access. Oil adjustment uses a separate service opening and is reserved for U-Boat’s specialized technicians, so the two operations should not be treated as the same procedure.

How should I store the watch when I am not wearing it?

Keep it within U-Boat’s stated 0–60 °C range, away from prolonged direct sunlight, heat sources, and large temperature changes.

Still have questions? Talk to a specialist

Verified Reviews

  • 5 stars: 2 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
I
Instalaciones A.F.s. (Valencia, Spain)

Reloj de Cuarzo U-Boat Capsoil Darkmoon 44 IPB, Negro, 44 mm, Silicona, 8464/A

J
JOAN P. (Barcelona, Spain)
Rapidesa de enviament

Bona comunicació
Excel·lent producte

FAQ

Yes, we are an Official  U-Boat Authorized Dealer, and an authorized 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.

Please contact our team.

Yes — free DHL Express shipping on all orders over $250 (US only).

  • Orders between $150 and $249.99 ship via DHL Express for only $9.90.
  • Orders under $150 ship via DHL Express for $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 2-3 days, depending on your location.

No, the price you see at checkout is the price you pay — nothing else. 

The price you pay at checkout is the final price of the item delivered to your address.

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 wire 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 wire transfer — often the preference on higher-value orders

Every transaction is fully encrypted, and we never store your card details.

Financing. Choose PayPal at checkout and you may be offered the option to split your purchase into payments or finance it over time, including interest-free plans on qualifying orders. You'll see exactly what's available for your order before you confirm — plans, terms, and eligibility are set by PayPal and subject to their approval, with no obligation to take it.

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:

"In stock, ships within 24 hours" or "Only X units left" — the item is in our warehouse and ships the next business day after you order.

"In stock, ships within X days" — the item is held at our secondary warehouse. We allow a few days to inspect and authenticate it before it ships.

"Check delivery date" — the item 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 delivery 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 shipping cost is deducted from your refund. If the item arrived damaged or wasn't what you ordered, the return is on us.

Your refund options.

  • Store credit (issued as a gift card) — processed almost immediately once your return reaches us
  • Refund to your original payment method — typically 5–10 business days to appear, depending on your bank or card issuer

To qualify for a full refund, the item 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 sure whether something qualifies? Ask us before you ship it back — we'll tell you straight. Contact our team.

TALK TO A SPECIALIST

Still have questions?

Our specialists are here before and after you buy — no pressure, no obligation. Authorized dealer, official warranty, and guaranteed authenticity on every piece.