Authorised Ball Retailer
Ball Engineer Hydrocarbon NEDU Automatic Watch
Colour: Black
· Ref: DC3226A-S4C-BK
£4,390
VAT incl. · Free express delivery
15%
off with your code
Apply it at checkout · Your price: £3,731.50
Colour: Black
Authenticity
Authorized Ball dealer
Warranty
Official Ball warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Overview
The Ball Engineer Hydrocarbon NEDU is a dive chronograph with a black dial, an automatic helium-release valve in the crown, and 600 meters of water resistance.
Built for saturation diving
The NEDU takes its name from the U.S. Navy Experimental Diving Unit, which develops operational diving and decompression procedures for the armed forces. In the pressurized environment of saturation diving, helium can enter the case. As the surrounding pressure falls during decompression, the helium-release valve lets the helium escape and relieves the excess pressure inside the watch. The case is water-resistant to 600 meters.
A bezel for timing dives
A unidirectional chromed ceramic bezel frames the black dial and resists corrosion, scratches, and color fading from ultraviolet light. Super-LumiNova on the bezel markings glows after exposure to light. On the hands, dial, and pushers, 21 sealed tritium tubes glow continuously without needing to be charged. Underwater, the bezel times the dive itself, and at the surface the chronograph can track a separate interval.
Protected against magnetism
Magnetic resistance has been a Ball requirement since 1891. That year, a train collision at Kipton, Ohio, led Webb C. Ball to set standards for railroad watches. The watch is built to withstand shocks of 7,500 Gs (7,500 times the force of gravity). It also resists magnetic fields up to 4,800 A/m (the international standard for antimagnetic watches).
The details
The satin-finished titanium case measures 42 mm across and 17.3 mm thick, with an anti-reflective sapphire crystal and patented crown protection.
The COSC-certified Ball RR1402-C automatic chronograph movement records elapsed time up to 12 hours and has a 48-hour power reserve. COSC, the official Swiss chronometer testing institute, checks the accuracy of each certified movement over 15 days. Alongside the chronograph counters, the dial displays the weekday and date.
A satin-finished titanium bracelet fastens with a patented folding clasp that includes an extension.
At a glance
- Satin titanium case
- Chronograph
- 21 tritium gas tubes
- Ball RR1402-C · COSC chronometer · 48-hour power reserve
- Antimagnetic to 4,800 A/m · shock-resistant to 7,500 Gs
- Unidirectional rotating bezel · patented helium valve · patented crown protection
- 60 atm water resistance
Specs
Movement
Type
Automatic
Calibre
Ball RR1402-C
Power reserve
48 Hours
Frequency
28,800 vph
Jewels
25 jewels
Case
Material
Titanium
Diameter
42 mm
Thickness
17.3 mm
Crystal
Anti-reflective sapphire
Crown
Patented crown protection system
Antimagnetic
4,800 A/m
Impact resistance
7,500 Gs
Finish
Satin
Helium release
Automatic valve integrated into the crown
Dial
Color
Black
Calendar
Day and date
Lume
Hands, hour markers, pushers and bezel
Gas tubes
21 H3 Gas tubes
Water resistance
Rating
60 atm
Bracelet
Material
Titanium
Finish
Satin
Clasp
Type
Patented folding buckle with extension system
General
Country of manufacture
Switzerland
Bezel
Material
Ceramic
Luminous material
Super-LumiNova
Questions & Answers
When does the NEDU’s helium-release valve work?
During decompression after saturation diving, the automatic valve releases excess pressure from inside the watch. Helium can enter the case in a pressurized, helium-rich environment; as the surrounding pressure falls, the valve lets it escape. Ball integrates it into the crown. The bezel and chronograph remain separate ways to measure elapsed time.
How do the NEDU’s dial and bezel illumination systems differ?
The 21 tritium tubes on the hands, dial, and pushers provide continuous light. The ceramic bezel uses Super-LumiNova, a luminous coating that glows after it has been charged by exposure to light. 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.
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 test is done before the movement is fitted into the case, so the watch’s daily rate on the wrist can vary.
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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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- Bank transfer — often the preference on higher-value orders
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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.
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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