Mine is also an early Blut und Ehre etched Grawiso without RZM....
Grawiso is a combination of the Grafrath brothers, Solingen-Widdert (which is the locality):

GRA WI SO

Many companies did this, for example Arthur Schuttelhofer, Solingen: ASSO
Artur Melcher, Solingen: ARMESO

Grawiso-01.jpg (53.62 KB, 127 downloads)
Last edited by Jeronimo; 03/14/2018 08:25 PM. Reason: to add info