Authorised Ball Retailer
Ball Roadmaster Ocean Explorer Automatic Watch
Colour: Blue
· Ref: DM3120C-SCJ-BE
£2,980
VAT incl. · Free express delivery
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Colour: Blue
Authenticity
Authorized Ball dealer
Warranty
Official Ball warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Overview
Limited to 1,000 watches, the Ball Roadmaster Ocean Explorer tracks the tides alongside the moon phase, for anyone who plans their time on the water.
Tides and moon phase on one dial
The moon phase and tide indications share a single blue dial. The external rotating bezel indicates high and low tides over a two-week period. A module developed by Ball shows spring and neap tides beside the moon phase.
Spring tides occur near new and full moons, when the sun, Earth, and moon are approximately aligned. Neap tides occur around the quarter moons. Before a fishing trip or a sail, a glance at the watch shows where the tide cycle stands.
Rooted in railroad timekeeping
Ball’s motto is “accuracy under adverse conditions.” That idea goes back to 1891, when a train collision at Kipton, Ohio, led Webb C. Ball to set inspection standards for railroad watches. Inside the case, the Ball RR1803-C automatic movement powers the time and date.
Lit by 33 tritium tubes
Thirty-three sealed tritium gas tubes illuminate the hands, dial, and moon-phase display continuously, without needing to be charged by light. The bezel markings use Super-LumiNova, which stores light from an outside source and releases it as a glow.
The details
The stainless steel case measures 41 mm across and 14.8 mm thick, with an anti-reflective sapphire crystal and a screw-down crown. Magnetic resistance is rated at 4,800 A/m (the international standard for antimagnetic watches), and the case is water-resistant to 100 meters. A stainless steel bracelet fastens with a folding clasp.
At a glance
- Limited to 1,000 watches
- Moon phase · tide indicator
- 33 tritium gas tubes
- Ball RR1803-C
- Antimagnetic to 4,800 A/m
Specs
Movement
Type
Automatic
Calibre
Ball RR1803-C
Case
Material
Stainless steel
Diameter
41 mm
Thickness
14.8 mm
Crystal
Anti-reflective sapphire
Crown
Screw-down crown
Antimagnetic
4,800 A/m
Product
Limited edition
1000 units
Dial
Color
Blue
Calendar
Date
Lume
Hands, hour markers and bezel
Gas tubes
33 Micro gas tubes
Water resistance
Rating
10 atm
Bracelet
Material
Stainless steel
Clasp
Type
Foldover clasp
General
Country of manufacture
Switzerland
Questions & Answers
How do the moon phase and tide indications work together?
The external bezel indicates high and low tides over a two-week period. Ball’s movement module shows spring and neap tides beside the moon phase. Spring tides occur near new and full moons, when the sun, Earth, and moon are approximately aligned; neap tides occur around the quarter moons. You can follow those stages of the tide cycle alongside the moon phase on the watch.
How are the lunar display and tide bezel illuminated?
The 33 tritium tubes illuminate the hands, dial, and moon-phase display continuously. The tide bezel uses Super-LumiNova, which glows after exposure to an outside light source. Inside each sealed glass tube, tritium activates a luminous coating. The tubes glow continuously, without a battery or any need to be charged by sunlight or a lamp. The glow gradually fades as the tritium decays, with a half-life of about 12.3 years.
What does magnetic resistance mean for the movement?
Magnetic fields can disturb a mechanical movement’s rate. Magnetic resistance is rated at 4,800 A/m. Stronger fields can exceed that protection.
Why is it important to secure the crown after setting?
After setting or winding, return the crown to its closed position and screw it fully into the case before contact with water. Correct closure is needed to maintain the rated water resistance.
Still have questions?
Talk to a specialist
Verified Reviews
FAQ
Yes, we are an Official Ball 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 Ball packaging, with all official documentation and the Ball 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.
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Our prices include VAT, and nothing is added beyond the delivery charge shown.
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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.
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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?
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