Hello all! I've got a shave ready Grah & Plumacher Wald-Solingen coming in!

The GP is Wald-Solingen though, not the city stamp usually seen on GP razors (Solingen-Weyer). Any ideas?

BeBerlin showed me a link that associates Grah and Plumacher to Ern in Wald...anyone else know a little more? I think this stamp may pin the date pretty well.

Thanks!