is a 30 Watt transistor 2×12 guitar amp, probably built around the late 70s. You can check the date from the serial number. We started with the letter A suffix in 1969, so B is 1970, C is 1971 etc. This combo came at a time when transistors were in their infancy so far as guitar amps were concerned and hence didn't quite make the impact that other products made. It was also designed to look very different from its valve powered cousins.