history or any place for info on Goya hollow body electric Pro 11

Does anyone know where I can get any info on my brothers Goya bought in the seventies, it's a hollow-body electric

wide body, pro 11 model 900 series..i do have the serial number and that is all that is on the guitar...gold plated with cutagway and in minti condition!  thankyou!  any help would do..have searched everywhere...but nothing found at all!

only found the thin body electrics!