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Ball Engineer III Ohio ChronometerAutomatic Watch
Color: White
· Ref: NM9026C-S5CJ-SL
$2,979
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Color: White
Authenticity
Authorized Ball dealer
Warranty
Official Ball warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Overview
Named for the Ohio roots of Ball’s railroad history, the Ball Engineer III Ohio combines a COSC-certified movement with mu-metal shielding and a white dial.
Ball’s Ohio roots
Webb C. Ball established his business in Cleveland, Ohio, where his railroad timekeeping work also took shape. After the 1891 train collision at Kipton, Ohio, he set the standards that railroad watches had to meet.
Easy to read, day or night
The clear dial shows the time and date at a glance. Fifteen sealed tritium gas tubes illuminate the hands and dial markings continuously.
The tubes produce their own light, so you can read the time after dark without first charging them under a lamp or in sunlight.
Shielded from magnetism
Inside the case is the COSC-certified Ball RR1103-C automatic movement. COSC, the official Swiss institute that certifies chronometers, tests each movement for 15 days. A mu-metal shield diverts magnetic fields around the movement to help protect its rate. Magnetic resistance is rated at 80,000 A/m, equivalent to 1,000 gauss.
The details
The case and 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. Shock resistance is rated at 5,000 Gs (5,000 times the force of gravity), and the case is water-resistant to 100 meters. The bracelet closes with a folding clasp.
At a glance
- 904L stainless steel case
- 15 tritium gas tubes
- Ball RR1103-C · COSC chronometer
- Antimagnetic to 80,000 A/m (1,000 gauss) · shock-resistant to 5,000 Gs
Specs
Type
Automatic
Diameter
40 mm
Crystal
Anti-reflective sapphire
Rating
10 atm
Type
Foldover clasp
Country of manufacture
Switzerland
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
Antimagnetic
80,000 A/m
Impact resistance
5,000 Gs
Dial
Color
White
Calendar
Date
Lume
Dial, hands and hour markers
Gas tubes
15 Micro gas tubes
Water resistance
Rating
10 atm
Bracelet
Material
904L Stainless steel
Clasp
Type
Foldover clasp
General
Country of manufacture
Switzerland
Questions & Answers
What is the Ohio connection?
Ohio is where Webb C. Ball established his business and developed his railroad timekeeping work. The model takes its name from that history, with a clear time-and-date display and self-powered illumination.
Does the gas-tube illumination need charging?
No. This watch uses 15 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 test is done before the movement is fitted into the case, so the watch’s 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.
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FAQ
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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.
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You have 30 days from delivery to return your order.
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Your refund options.
- Store credit (issued as a gift card) — processed almost immediately once your return reaches us
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