Chronomaster Aviator Sea Diver Automatic

Chronomaster chronograph range side by side

Chronomaster Aviator Sea Diver Automatic Collection

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      Chronomaster Aviator Sea Diver Automatic

      The automatic Chronomaster Aviator Sea Diver runs on the Swiss Landeron 72 self-winding chronograph calibre, in a 41 mm steel case rated 10 ATM, with a bi-directional rotating bezel and a Broad Arrow, Panda or Tropical dial.

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      Chronomaster Aviator Sea Diver Automatic

      The 1960s Nivada Grenchen chronograph in a larger 41 mm case, wound by the movement of your wrist. Made by Nivada Grenchen, founded in Grenchen in 1926.

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      Automatic Chronomaster FAQ

      Not if you wear it every day: the rotor winds the Landeron 72 as your wrist moves. If it has stopped, a few turns of the crown start it again.

      No. The 41 mm models have a bi-directional rotating bezel. Tool-free interchangeable bezels are on the 38 mm models, shown in interchangeable bezel watches.

      The 41 mm case is 15.85 mm thick and 48.5 mm lug to lug. The 38 mm hand-wound models are smaller and thinner.

      10 ATM, about 100 metres.

      About Chronomaster Aviator Sea Diver Automatic

      The automatic Chronomaster Aviator Sea Diver is the self-winding version of the Nivada Grenchen chronograph first presented in the 1960s. It comes in a 41 mm case, larger than the 38 mm hand-wound models, and is made by Nivada Grenchen, founded in Grenchen in 1926.

      Automatic Chronomaster Aviator Sea Diver, 41 mm

      Each model uses the Swiss Landeron 72 automatic chronograph calibre, at 28,800 vibrations per hour (4 Hz). The 316L stainless steel case is polished and brushed, 41 mm wide, 15.85 mm thick and 48.5 mm lug to lug, with a 20 mm lug width, a double-domed sapphire crystal, a bi-directional rotating bezel and 10 ATM water resistance, about 100 metres. The dial shows a 30-minute counter at 3 o'clock, small seconds at 9 o'clock and a central chronograph seconds hand, run by two pushers.

      For the 38 mm models with interchangeable bezels, see the hand-wound Chronomaster Aviator Sea Diver. The full family is in Chronomaster Aviator Sea Diver, and other self-winding watches are in Swiss automatic watches.