Vintage Tube Amp

This appears to be a very cool piece of electrical testing equipment or diagnostic equipment of some kind. Im not actually sure what it is or what its purpose is. It appears as if it could be some sort of experimental oscilloscope, early television, early amplifier, or some sort of other piece of testing equipment. The whole thing is 3 separate units on a rack that connect in the back. If you have any insight into what it is or what its purpose may be Id love to learn more about it. The metal for the chassis of each piece has a very nice swirl design so some rela craftsmanship went into building this. The rack has wheels but the rubber is so old it has started to degrade and break down making them no longer usable. The last picture shows a page with details of tube types. See photos for details. Physical addresses only no PO or apo boxes.

2 VINTAGE GREAT TESTING GE 5AR4/GZ34 TUBES. ONE GREAT BRITAIN TUBE ONE USA TUBE. THE USA TUBE HAS COPPER GRID POSTS. BOTH WERE TESTED ON A JACKSON 648 TESTER AND THEY BOTH TESTED FANTASTIC. ABOUT THE SAME ON BOTH PLATES. TEST LIKE NEW OLD STOCK TUBES, BUT THEY ARE USED. NO LEAKAGE OR SHORTS. READINGS ARE VERY ACCURATE.