These amps were in the possession of Marc Rodamilans of La Cocina studio. They are all Mexican-made, and all appear to date from the 70's. Electronicos Golden Gate apparently existed for most of that decade, and their amps are actually pretty well-built. Sonatone and Fair we know nothing about.
Electronicos Golden Gate Model 1155 (Guitar Head with Reverb)
Electronicos Golden Gate Model 2015 (2x12" Bass Amp Combo)