1920s Mullard PM26 Radio Pentone Valve In Its Original Box

This amazing collectible is a 1920s Mullard PM26 Radio Pentone Valve In Its Original Box; where PM stands for Philips-Mullard. A nice display item for the office or radio shack!

It is nearly 100 years old, has never been used and hasn't been tested. As a piece of radio history made by Mullard Radio Valve Co. Ltd, Nightingale Lane, Balham, London, it is being sold as a collectible for display only. 

This Pentone valve has its original paper label with the warning "THERE IS NO GLOW FROM THIS FILAMENT" and information about the filament voltage and current, and maximum anode voltage. 

The cardboard box is intact with scuffs and blemishes commensurate with age and storage. The colours have faded but are still legible.

Original Specification:

• Brand: Mullard Radio Valve Co.Ltd etched on the side in white
• Type: Pentone
• Patent B149
• Base: 4-Pin B4 with a single slot in each pin (split pin)
• Filament: 
• Voltage 6.0 Volts
• Current ~0.17 amps 
• Anode Voltage 150 Volts
  

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