• Country
• Netherlands

• Manufacturer / Brand
• NSF Nederlandsche Seintoestellen Fabriek, Hilversum

• Year
• 1925

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 69740

• Tuned circuits
• 1 AM circuit(s)

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Zeefkring - NSF Nederlandsche

• Shape
• Tablemodel, with any shape - general.

• Notes
• Information taken from Radio Amateur Museum NL-5541 CH Reusel. Picture Nr.: 004.22

• External source of data
• Radio Amateur Museum / Frans J.J. Driesens + ISBN 90-76014-04-3.

• Source of data
• Opkomst van de Nederlandse Radio-Industrie

• Other Models

• Here you find 165 models, 120 with images and 94 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from NSF Nederlandsche Seintoestellen Fabriek, Hilversum