Leban 23 Tube Guitar Amplifier

This is a tube guitar amplifier I found at an estate sale. In this video I examine the Leban 23 amp and demonstrate it. I am looking for more information regarding this amplifier and hopefully a schematic. The amp appears to be from the 60's or 70's. In a future video I will take a closer look at the circuit, clean the volume control, and replace the filter capacitor to attempt to reduce the hum.