These were originally packaged and sold with a Gibson lap guitar. Very cool; the amp has two 6V6 power tubes and it uses an interstage transformer (not a phase inverter tube) to drive them in push-pull. It makes maybe 10 watts.
The cab is a little trapezoidal thing, with a 10-inch field coil speaker. One knob for volume, no tone control. It is similar to the 1947 Gibson amp I once had. It has a nice old school tone.