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Tacky scales, laser etched maker's mark in sans serif font? That is not the Sanssouci brand we are talking about here. That is a retired craftsman working with blanks he most likely received as wages...

Well, yes, that would be this castle in Potsdam. And this Loreley rock.

Using English language search terms for German goods will typically get you nowhere. "Sanssouci +Rasiermesser", however, will. Made by Walter Kesemeyer, Hugo Müller or Hugo Koller. Or others. Cf....