I also have a Juan de Perez!
Model Sevilla that I bought about 25 years ago in Sweden.
It was the most expensive guitar (350-400$) I could afford back then.
I played it for a few years but then quit classical guitar and played some rock guitar. Now 20 years later I restringed it and have so much fun learning guitar again.
I don't know enough to tell if it's a good guitar or not but I am quite fond of it and it sounds better than I remember (I also have managed to grow nails this time
Kind regards Mårten
I also tried the internet but came up empty so if anyone has information it'd be appreciated.