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U-Boat Capsoil Darkmoon Soleil Blue SS Quartz Watch
Color: Blue
· Ref: 8704
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Color: Blue
Authenticity
Authorized U-Boat dealer
Warranty
Official U-Boat warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Overview
U-Boat Darkmoon Soleil Blue SS brings a blue sunray dial into an oil-filled 44 mm steel case, adding depth beneath domed sapphire.
Fine brushing radiates across the blue dial, changing its reflections as the light moves. Seen through oil, the color appears deeper and the hands seem to sit closer to the domed sapphire above them. The combination gives this Soleil version its retro character, with Super-LumiNova on the hands and hour markers adding a luminous contrast in low light.
The oil also surrounds the Swiss Ronda 712.3 quartz movement, lubricating it as it runs. A visible compensation bubble moves through the fluid 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. A screw-down crown with a double security system sits on the left for setting the time.
The screw-down back incorporates U-Boat’s Locking Ring System for quick access to the battery. Oil adjustment uses a separate opening reserved for U-Boat’s specialized technicians.
Made in Italy, this reference comes on a black silicone strap measuring 22 mm at the watch, with a stainless steel pin buckle. Water resistance is rated at 5 atm. U-Boat specifies an operating temperature range of 0–60 °C and advises against prolonged exposure to sunlight or heat.
At a glance
- Blue Soleil sunray dial
- Oil-filled display with moving compensation bubble
- Swiss Ronda 712.3 quartz movement
- 44 mm 316L stainless steel case
- Domed sapphire crystal
- Super-LumiNova hands and hour markers
- Double-security screw-down crown
- Locking Ring System for battery access
- 22 mm black silicone strap
Specs
Type
Quartz
Diameter
44 mm
Crystal
Domed sapphire
Rating
5 atm
Type
Buckle
Country of manufacture
Italy
General
Collection
Capsoil
Country of manufacture
Italy
Operating temperature
0–60 °C
Movement
Type
Quartz
Calibre
Ronda 712.3
Case
Material
Stainless Steel 316L
Crystal
Domed sapphire
Diameter
44 mm
Crown
Screw-down crown
Case back
Screw-down
Oil fill
Oil-filled display with compensation bubble
Dial
Color
Blue
Lume material
Super-LumiNova
Lume
Hands and indices
Finish
Soleil sunray
Water resistance
Rating
5 atm
Strap
Material
Silicone
Color
Black
Width
22 mm
Clasp
Type
Buckle
Material
Stainless Steel
Crown
Security
Double security system
Position
Left side
Service
Access
Separate battery-access compartment and oil-adjustment opening; oil adjustment reserved for U-Boat specialized technicians
Questions & Answers
What does the Soleil finish add to the dial?
Fine brushing spreads outward in a sunray pattern, changing how the blue surface reflects light. Soleil is the finish, rather than a single color; the collection also includes green, brown, and red dials.
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 provides a compartment for battery access. A separate opening is used for oil adjustment, which U-Boat reserves for its specialized technicians. Battery replacement should be handled by a service center.
Still have questions?
Talk to a specialist
Verified Reviews
F
Better than expected! Great service and tracking can’t be happier!
A
This is my 4th U-Boat watch and in my opinion the best looking one so far.
J
The picture doesn't do it service. I have or had a Rolex, Panerai, Maurice Le Croix, Brietling and a Glashutte and this is the best valued watch I've had.
I'm afraid to say it but they aren't charging enough
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.
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.
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