E1 ❗ Untested vintage McElroy Mfg. Corp. tube power supply / speed control unit ❗ Condition unknown — sold AS-IS ❗ Return shipping paid by buyer ❗ Power cord is in very poor condition ❗ Heavy corrosion, dust, and wear — see photos ❗ For restoration, repair, or parts only This unit was manufactured by McElroy Mfg. Corp., Boston, Massachusetts, USA. The label indicates it was treated for moisture and fungus resistance in May 1945, placing it in the WWII era. Inside the cage you can see vacuum tubes and internal components. No testing was performed. What you see in the photos is exactly what you will receive.