description
Chronometer Manufacture Caliber RRM7309-S. Inspired by the exacting standards set by our trailblazer Webb C. Ball in 1891, the new caliber delivers next-level precision: accuracy range of -2/+5 seconds per day, a silicon balance spring and 2,500 Gauss anti-magnetism. In the creation of the RRM7309-S, our watchmakers combined new material with traditional watchmaking and created something truly marvelous. As a material choice, silicon offers high anti-magnetism and corrosion resistance, it also offers enhanced stability to temperature fluctuations. The result of years long development is the all-new Manufacture Caliber RRM7309-S, with extreme anti-magnetic protection to 2,500 Gauss, enhanced shock resistance and most importantly, a 30% increase in precision as compare to the COSC standard.
Product Specifications
- SKU: NM9032C-S2C-BK1
- Movement: Swiss Automatic
- Water Resistance: 10
- Case Material: Stainless Steel
- Case Description: Stainless Steel Case
- Case Height: 13.0
- Case Size: 40.0
- Case Color: Silver
- Crystal Type: Sapphire
- Crown Type: Screw Down
- Dial Color: Black
- Strap Material: Stainless Steel
- Strap Color: Silver
- Weight: 0.0
Ball
Engineer M Pioneer Black 40mm Black Dial
Item No:
NM9032C-S2C-BK1
$3,999.00
$3,999.00
ABOUT THE BRAND
Ball
Founded in 1891 by Webb C. Ball, Ball Watch Company was born from a commitment to precision and reliability after a historic U.S. railroad accident. Setting the first official chronometer standards for American railroads, Ball became synonymous with accuracy and safety. Today, the brand continues its legacy of rugged innovation — combining Swiss craftsmanship with pioneering features like self-powered micro gas lights for unmatched visibility. Known for its durability, heritage, and adventurous spirit, Ball Watches embody the motto “Accuracy Under Adverse Conditions,” appealing to explorers and professionals who value precision, endurance, and timeless design.
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