• Country
• Great Britain (UK)

• Manufacturer / Brand
• Marks and Spencer Ltd.; London

• Year
• 1925 ??

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 198987

• Wave bands
• - without

• Power type and voltage
• Is a battery or storage battery / 9 Volt

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: Marspen Grid Bias Battery 9 Volts - Marks and Spencer Ltd.; London

• Shape
• Chassis only or for «building in»

• Notes
• Marspen 9 Volts Grid Bias Battery;
  British made for Marks & Spencer Ltd.

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Marks and Spencer Ltd.; London