This appears to be a vintage Knight Model 600 Tube Tester, manufactured by Allied Radio Corporation in Chicago, Illinois, USA. These were popular DIY kit or assembled units from the mid-20th century (circa 1950s-1960s) for testing vacuum tubes in radios, TVs, and other electronics. 2 3 5 It features a multi-scale meter with “Replace? Test Good” indicators, rotary knobs for filament voltage adjustment (0-120V), load control, circuit value, and line adjust. There’s a row of 10 lever switches for selecting tube elements/pins, a short test toggle, gas/line test button, and multiple socket types for various tube bases (octal, loctal, miniature, etc.). Includes a test probe cable.
Condition: This unit is being sold AS-IS for parts, repair, or display. It’s untested and shows signs of age including dust, minor rust on components, and wear on knobs/labels. No visible major damage, but functionality is unknown—no power cord or accessories included beyond what’s shown. Scribbled note “1859” on the panel (possibly a previous owner’s mark). Great for antique radio enthusiasts, restorers, or collectors of mid-century test equipment.
Measurements: Approx. 12” x 8” x 4” (estimate from photos—please confirm if needed).
Shipping: Carefully packed; buyer pays actual shipping costs. No returns due to as-is nature. Please ask questions before bidding!