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Ball Engineer Hydrocarbon NEDU Automatic Watch
Color: Blue
· Ref: DC3226A-S3C-BE
$6,509
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Color: Blue
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 blue 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 blue 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 benchmark for anti-magnetic watches).
The details
The 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 stainless steel and titanium bracelet closes with a folding clasp.
At a glance
- 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
Type
Automatic
Diameter
42 mm
Crystal
Anti-reflective sapphire
Rating
60 atm
Type
Buckle with folding clasp
Country of manufacture
Switzerland
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
Helium release
Automatic valve integrated into the crown
Dial
Color
Blue
Calendar
Day and date
Lume
Hands, hour markers, pushers and bezel
Gas tubes
21 H3 Gas tubes
Water resistance
Rating
60 atm
Bracelet
Material
Stainless steel and titanium
Clasp
Type
Buckle with folding clasp
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. This watch has magnetic resistance to 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 traditional test is performed before the movement is fitted into its case; its daily rate on the wrist can vary.
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