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Ball Engineer III Marvelight Chronometer Automatic Watch
Colour: Green
· Ref: NM9026C-S6CJ-GR
£2,110
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Colour: Green
Authenticity
Authorized Ball dealer
Warranty
Official Ball warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Overview
The Ball Engineer III Marvelight Chronometer pairs a COSC-certified movement and mu-metal magnetic shielding with a green dial that stays readable all night.
Easy to read, day or night
The green dial shows the hours, minutes, and sweep seconds, with a magnifier that makes the date easier to read. Fourteen sealed tritium tubes keep the hands and hour markers illuminated continuously. Inside each glass tube, tritium activates a luminous coating, producing a glow without a battery or any charge from sunlight or a lamp.
A certified movement, shielded from magnetism
Magnetic resistance has been a Ball standard since 1891, when Webb C. Ball set requirements for railroad watches after a train collision at Kipton, Ohio. Inside the case, the COSC-certified Ball RR1103-C automatic movement powers the time and date. COSC, the official Swiss institute that certifies chronometers, tests each movement for 15 days.
A mu-metal shield redirects static and low-frequency magnetic fields around the movement. Made of nickel, iron, copper, and molybdenum, it provides resistance up to 80,000 A/m (1,000 gauss). That shielding is useful at a desk surrounded by laptops, phones, and speakers, all of which produce magnetic fields. The case is water-resistant to 100 meters.
The details
The case and matching bracelet are made from 904L stainless steel. The alloy’s chromium, molybdenum, nickel, and copper content gives it resistance to corrosion and acids. The case measures 40 mm across and 13.15 mm thick, with an anti-reflective sapphire crystal and a screw-down crown. The bracelet fastens with a folding clasp.
At a glance
- 904L stainless steel case
- 14 tritium gas tubes
- Ball RR1103-C · COSC chronometer
- Antimagnetic to 80,000 A/m — 1,000 Gauss
Specs
Movement
Type
Automatic
Calibre
Ball RR1103-C
Case
Material
904L Stainless steel
Diameter
40 mm
Thickness
13.15 mm
Crystal
Anti-reflective sapphire
Crown
Screw-down crown
Antimagnetic
80,000 A/m
Dial
Color
Green
Calendar
Date (magnified)
Lume
Hands and hour markers
Gas tubes
14 Micro gas tubes
Water resistance
Rating
10 atm
Bracelet
Material
904L Stainless Steel
Clasp
Type
Foldover clasp
General
Country of manufacture
Switzerland
Questions & Answers
Does the gas-tube illumination need charging?
No. This watch uses 14 tritium gas tubes. 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.
Why are 904L steel and mu-metal both used in this watch?
They serve different purposes. The 904L steel forms the case and bracelet; its chromium, molybdenum, nickel, and copper content gives it resistance to corrosion and acids. A mu-metal shield inside the case redirects static and low-frequency magnetic fields around the movement to help protect its rate. The watch is rated to 80,000 A/m (1,000 gauss). Stronger fields can exceed that protection.
What does COSC certification mean for this movement?
The movement passed independent chronometer testing over 15 days, in five positions and at three temperatures. The permitted average daily rate during testing is -4 to +6 seconds. The traditional test is performed before the movement is fitted into its case; its daily rate on the wrist can vary.
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.
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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