ONE(1) NOS/NIB National Union 1943  JAN-CNU-813 Tube  Tested Filament Continuity

Condition: Opened Box Tested Good Filaments have Continuity,

Original Mil-Spec Box Dated 1943 WW2 US Army Navy Contract. 

with original packing/dampening materials

Clean Glass, Clean Metal base & Top Cap, Clean pins, plug-in and Transmit condition

-No Rattles, No Flakes, No Loose parts, Tight base

We believe this is an unused NOS/NIB vacuum tube.