• Manufacturer : WM. J. Murdock Co.
  • Type : U.S.V.B.
  • Produced : 1930's - Chelsea, Mass.,  U. S. A.
  • Patented :  -
  • Device : headphones 2x 1000 ohms with metal diaphragmas
  • Material : bakelite, leather and metal
  • Operating estimation (1-10) : 7
  • Global estimation (1-10) : 8
  • Specials : general applications mostly in some government institutions
          before WW2
  • Note : rare sample

Back