Western Electric 313C Electron Tube Valve Vacuum Tube - Vintage - USA Made

Vintage electron tube, a Western Electric 313C, new in its original box. This valve or vacuum tube, still in its original packaging, appears to be in good condition. Made in the USA, it's identified as Electron Tube Type 313C and the box carries information regarding its license for distribution and instructions for disposition of defective tubes. I am new to tubes so this is untested, but from a reputable source. Type: Electron Tube Keywords: Telephone, Vintage, Audio, Western Electric, 313C, Electron Tube, Vacuum Tube, Valve, Vintage Tube, NOS Tube, Audio Tube, Tube Amplifier, Made in USA, Vintage Electronics, Tube, Amplifier Tube