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Authorised Luminox Retailer
Luminox Sea Pacific Diver Quartz Watch
Colour: Black
· Ref: XS.3121.BO
£492£579
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VAT incl. · Free express delivery
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Colour: Black
Authenticity
Authorized Luminox dealer
Warranty
Official Luminox warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Overview
Luminox Pacific Diver Quartz Watch with Black Dial.
California’s Pacific coast, where Luminox was founded in 1989, gives the Pacific Diver line its name. Alongside the 3140 chronographs, the Pacific Diver 3120 forms the collection’s standard series. Its 316L stainless steel case measures 44 mm and is 12 mm thick.
The Swiss Ronda 515 quartz caliber powers the hours, minutes, seconds, and date beneath an anti-reflective sapphire crystal. The case features a screw-in crown, a CARBONOX™ unidirectional bezel, and a 316L stainless steel screw-in case back.
Tritium gas tubes illuminate the hands and hour markers on the black dial for up to 25 years. The black cut-to-fit rubber strap measures 24 mm at the lugs and fastens with an IP black steel buckle.
At a glance
- Tritium gas tubes · self-powered light for 25 years
- 105 g · Stainless Steel 316L case
- CARBONOX™ unidirectional bezel
- Swiss Ronda 515 quartz caliber · 50-month cell
- Steel screw-in case back
- 24 mm lug width
- Screw-down crown
Specs
Movement
Type
Quartz
Calibre
Ronda 515
Case
Material
Stainless Steel 316L
Diameter
44 mm
Thickness
12 mm
Crystal
Anti-reflective Sapphire
Crown
Screw-down crown
Case back
Screw-down
Bezel
Function
Hour scale
Dial
Color
Black
Calendar
Day
Lume
Hands and indices
Gas tubes
Night Vision Tubes (25 years)
Water resistance
Rating
20 atm
Strap
Material
Rubber
Width
24 mm
Clasp
Type
Buckle
General
Country of manufacture
Switzerland
Warranty
3 years
Brand
Luminox
Line
Sea Pacific Diver
Questions & Answers
How is the Pacific Diver collection divided?
Into standard 3-hand watches in the 3120 and 3120M series, chronographs in the 3140 series and automatics in the 3100 series, all with a stainless steel case. Luminox was founded in 1989 by Barry Cohen and Richard Timbo, and assembles and tests its watches in Solothurn, Switzerland.
How does Luminox Light Technology work?
Each marker is a borosilicate glass capsule about 0.5 mm across, coated inside with phosphorescent powder and filled with tritium gas, so it glows around the clock with nothing to charge. Luminox holds the intensity constant for the first 10 years, and after that the brightness decreases gradually as the gas loses energy, over a visible life of up to 25 years.
How often does the battery need changing?
Luminox rates this movement at 50 months on a battery. The tritium tubes are self-powered and draw no energy from the battery.
How well does the crystal hold up?
Sapphire rates 9 on the Mohs scale, just below diamond, and Luminox gives it an anti-reflective coating for readability at any angle in bright light.
Who makes the movement?
Ronda, in Lausen, Switzerland. The watch carries the Swiss Made mark, which requires at least 60% of the manufacturing costs of the watch head to be incurred in Switzerland.
Still have questions?
Talk to a specialist
Verified Reviews
FAQ
Yes, we are an Official Luminox 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 Luminox packaging, with all official documentation and the Luminox 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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