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There is a thread about the new Revisor homepage that should shed some light on their capabilities of manufacturing.
They also have Gong (ERN), Herder and Schlieper, which are long time dead....

Here it is. They don't say they are making these razors by themselves.
Just that they are made in Solingen.
So you might get the same stuff as from Dovo, Puma, Revisor, Messer-Outlet.de - just for...

I think this happens when someone buys, resurrects or inherits an old brand name and pretends to manufacture blades.

Yes, there are some old brand names popping up again.
Puma did, Revisor did, too.
The new stuff is not comparable to the vintage blades though.
Currently there are only five or six workshops for...