State-of-the-art:  multiple inputs, volume and tone control, and a separate power switch, with fuse.

In 1946, this was an upscale amp  - it was probably sold alongside the new National Steel guitars.  Designated the '510', the amp had 5 tubes and a 10-inch Rola field-coil speaker.


I think this amp sat unused for several decades because of a broken power switch.

VINTAGE ELECTRONICS

HardWay
 

1946 National / Valco Supreme Amplifier

The circuitry remains just as it was in 1946, except for the addition of a three-conductor power cord.


Amazingly, the capacitors and other components are still in good working order, after 72 years.  The next time someone says that electrolytic capacitors only have a lifespan of 10 years, remember this amp!