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ATLANTIC
Watch Winding Specifications

Atlantic watches logo.

In 1888 Eduard Kummer founded in Bettlach, Solothurn, near Grenchen, a watch factory under the name "EKB" (Eduard Kummer Bettlach) for the manufacture of pocket watches. Initially the firm employed 20 watchmakers, but early in the new century, the number of employees rose up to 720 workers.
In the 1920's "EKB" was one of the first producers of waterproof wristwatches. For this reason, the name EKB was altered to Atlantic.

Watch Model Direction Turns Per Day (TPD)

Grand Tonneau

Both

650

Mariner Barrel

Both

650

Mariner Chronographs

CW

800

Mariner Classic

Both

650

Mariner Square

Both

650

Regatta Start Chronographs

CW

800

Seacrest 35

Both

650

Seacrest 38

Both

650

Seacrest Automatic

Both

650

Seahunter 50 Automatic

Both

650

Seaport

Both

650

Seashark Automatic

Both

650

Seashore

Both

650

Seawave

Both

650

Skipper

Both

650

Skipper Regatta Chronographs

CW

800

Worldmaster 2

Both

650

Worldmaster 1888

Both

650

Worldmaster 1888 w/small seconds

Both

650

Worldmaster 1888 Reserve de Marche

Both

650

Worldmaster Art Deco Auto

Both

650

Worldmaster Classic Automatic

Both

650

Worldmaster Chronograph Valjoux

CW

800

Worldmaster Chronograph 2012

CW

800

Worldmaster Chronometer Automatic COSC

Both

650

Worldmaster GMT

Both

650

Worldmaster MarSq

Both

650

Worldmaster Mechanical

Both

650

Worldmaster Square

Both

650

If ever you are unable to find your watch model in this table, here's an easy way to determine the winding requirements for your ATLANTIC watches.

  • Select the combined winding mode (CW+CCW) and the minimal number of turns per day (TPD).
  • Place your watch into the winder and check after a few days how accurate your watch shows the time.
  • If it runs behind, it is necessary to increase the number of TPD by one increment.

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