Vintage machinery.org ...
Well very sorry. It certainly includes the likes of Harrison and Colchester.Please read the manufacturer's index at vintagemachinery as it outlines (in the sense of draws a boundary around) the geographical areas it includes in its scope. Europe/Germany is not included in that scope.
It would also be possible for a person to put lorch into the search box there and find it returned zero results before suggesting a dead end.
http://vintagemachinery.org/mfgindex/default.aspx
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