Köhler 1403593

I found this amazing Köhler 1403593 in an old house that we bought a few months ago. Never heard about this brand before. It's in amazing condition, considering where I fond it. Previous owners has probably not cared about it. Now it's a "showpiece" in our livingroom :)

Does anybody know how old it is, and/or where I can find out more information about it? Just "googeling it" doesn't work, 'cuz I can't find anything about it!