Manufactured by Eisenhammer AG, Thalheim, in the Ore Mountains, 1922-1926.
Motorcycles with two-stroke engines of 206cc and 225cc were produced. Some 800 were built and two of these machines still exist, one of which is in a collection in Thalheim.
Sources vary as to the origin of the engines - DKW is suggested, as is Gruhn, or they may have been built in-house.
One of the partners was Emil Curt Kretzschmar who founded the company Eceka Motorrad-Vertrieb Aktiengesellschaft in Berlin in April 1923. It is likely that Eisenhammer machines were rebadged and sold as Eceka.
The name Eisenhammer means "iron hammer".
Sources: GTU Oldtimerservice; johanngeorgenstadt.de; gewerbepark-zwoenitztal.de; Motopedia.
N.B. It is possible that motorcycles were produced by Löffler and Paul Rudolph at Maschinenfabrik Thalheim in the years 1919 to 1921, before the company name became Eisenhammer AG. (gewerbepark-zwoenitztal.de)
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