Now I know I am getting old. First it was my hearing, then my eyes, and now it's my memory. I checked again and you were right on the spelling. It is GOROSABEL! The most I could find out is where it was made and by who. Made in EIBAR SPAIN by PEDRO GOROSABEL.
On the RENO I found someone else who also had one. He was able to give me
CASA J URIGUEN also EL RENO MODEL OF URIGUEN it also was made in EIBAR SPAIN
There is a GOROSABEL 20ga on GUNBROKER now for I think $600.00.
That's all for now.
LONGTOM