Physical description
Western Electric 4205E tennis ball with nipple on top, vacuum tube. Base Europe 4-Pin B4. filament: Vf 4.5 volts/lf 1.6 Ampere.
Western Electric 4205E tennis ball with nipple on top, vacuum tube. Base Europe 4-Pin B4. filament: Vf 4.5 volts/lf 1.6 Ampere.