The tuning fork model 218 reached the market in 1965, as successor of the 214 model Charakteristics: Crown at 3 or 4, Tuning fork frequency: 360 Hz no externally accessible battery compartment, to change the battery the case back has to be removed. Models: 2180, Model 2180 without date 218D, 2181, 2181F, 2181G, Model 2181 with date 2182,2182F, 2182G, Model 2182 with Day/Date 2183, 2183F, 2183G, Modell 2183 witout second hand and date 2185, 2186, 218S, 218SC Modell 2185 second time zone (Astronaut) 2186 Modell 2186 with mechanical Digital display
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