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Ball Engineer Master II Diver Chronometer Automatic Watch
Color: Blue
· Ref: DM2280A-P1C-BER
$3,278
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Color: 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 Engineer Master II Diver Chronometer keeps its illuminated sapphire timing bezel inside the case, protected from knocks beneath the crystal.
An internal timing bezel
The internal bezel turns in both directions. You can time an interval on its elapsed-time scale while reading the time on the main hands. The bezel can time a dive or a swim as easily as a meeting at the office.
Easy to read, day or night
The blue dial shows the hours, minutes, and sweep seconds, and a magnifier makes the date easier to read. Thirty-six tritium tubes keep the hands, dial, and internal bezel markings lit continuously, without needing to be charged by light. This version uses rainbow tubes across the blue dial, adding several colors to the display after dark.
Rooted in railroad timekeeping
Precision has deep roots at Ball. Founder Webb C. Ball set inspection standards for railroad watches after the 1891 train collision at Kipton, Ohio.
Ball’s commitment to accuracy lives on in the COSC-certified Ball RR1101-C automatic movement, which provides a 42-hour power reserve. COSC, the official Swiss chronometer testing institute, checks the accuracy of each certified movement over 15 days. An Amortiser ring absorbs energy from lateral shocks to help protect the movement.
Shielded from magnetism
A mu-metal shield redirects static and low-frequency magnetic fields around the movement. Made from nickel, iron, copper, and molybdenum, it helps keep those fields from affecting timekeeping. Magnetic resistance is rated at 80,000 A/m (1,000 gauss).
The details
The stainless steel case measures 42 mm across and 13.5 mm thick, with an anti-reflective sapphire crystal and a screw-down crown. The watch is built to withs. It also resists shocks of 5,000 Gs (5,000 times the force of gravity). The case is water-resistant to 300 meters. The 21 mm rubber strap fastens with a pin buckle.
At a glance
- Limited to 1,000 watches
- Rainbow gas tubes
- 36 tritium gas tubes
- Ball RR1101-C · COSC chronometer · 42-hour power reserve
- Antimagnetic to 80,000 A/m — 1,000 Gauss · shock-resistant to 5,000 Gs
- 30 atm water resistance
Specs
Type
Automatic
Diameter
42 mm
Crystal
Anti-reflective sapphire
Rating
30 atm
Type
Buckle
Country of manufacture
Switzerland
Movement
Type
Automatic
Calibre
Ball RR1101-C
Power reserve
42 Hours
Frequency
28,800 vph
Jewels
21 jewels
Case
Material
Stainless steel
Diameter
42 mm
Thickness
13.5 mm
Crystal
Anti-reflective sapphire
Crown
Screw-down crown
Antimagnetic
80,000 A/m
Impact resistance
5,000 Gs
Magnetic shield
Mu-metal
Shock system
Patented Amortiser® system
Product
Limited edition
1000 units
Dial
Color
Blue
Calendar
Date (magnified)
Lume
Hands, hour markers and bezel
Gas tubes
36 H3 Gas tubes
Water resistance
Rating
30 atm
Strap
Material
Rubber
Width
21 mm
Clasp
Type
Buckle
General
Country of manufacture
Switzerland
Bezel
Material
Sapphire
Position
Internal
Rotation
Bidirectional
Questions & Answers
How is the internal sapphire bezel built into the display?
The internal sapphire bezel sits beneath the crystal and can be turned in both directions to time an interval. Gas tubes keep its elapsed-time markings illuminated continuously, using the same self-powered lighting technology as the hands and dial.
What does this gas-tube version look like after dark?
This reference has rainbow tubes across the blue dial. There are 36 tubes in total across the hands, dial, and internal bezel. 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.
How do Amortiser and the magnetic shield protect the Diver Chronometer?
Amortiser surrounds the movement with a protective ring that absorbs energy from lateral shocks. A mu-metal shield redirects static and low-frequency magnetic fields around the movement to help keep those fields from disturbing 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.
What helps preserve the watch’s water resistance?
Water resistance depends on the condition of the seals and correct closure of the crown and case. Seals change with age, so the pressure rating does not mean water resistance remains unchanged throughout the watch’s life. Follow Ball’s care and service instructions.
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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.
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 shipping cost is deducted from your refund. If the item arrived damaged or wasn't what you ordered, the return is on us.
Your refund options.
- Store credit (issued as a gift card) — processed almost immediately once your return reaches us
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