They are untested but should work fine with just a basic recap and some correct input/output terminals. Please be aware that this is probably a hot chassis amp (no power transformer) and you need to know what you're doing if you work on this.
This is a neat little vintage amp and you will have a lot of fun with it. Each piece is about 3.5" tall, not including the legs, 8" wide, and 4.5 deep. Please see my pictures for details and measurements. If you have any questions, please ask.
I have a number of other vintage tube amplifiers and other vintage electronics listed--feel free to take a look! The item "Vintage 1950s Tube Amplifier 50C5 35W4 12AU6 & speaker for Guitar Amp Rebuild" is in sale since Wednesday, January 23, 2019. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Parts & Accessories\Amplifier Parts & Accessories".music" and is located in Milwaukee, Wisconsin. This item can be shipped worldwide.