- Country
 - United States of America (USA)
 
- Manufacturer / Brand
 - Marathon Radio Co.; (where?)
 
- Year
 - 1925
 
- Category
 - Broadcast Receiver - or past WW2 Tuner
 
- Radiomuseum.org ID
 - 46783
 
- Number of Tubes
 - 5
 
- Valves / Tubes
 
- Main principle
 - TRF (Tuned-Radio-Frequency but use of regeneration unknown)
 
- Power type and voltage
 - Dry Batteries
 
- from Radiomuseum.org
 - Model: MR5 - Marathon Radio Co.; where?
 
- Shape
 - Tablemodel, with any shape - general.
 
- Notes
 - Two dials (primary tuning control knobs)
 
- Price in first year of sale
 - 140.00 $
 
- External source of data
 - Ernst Erb
 
- Source of data
 - Radio Collector`s Guide 1921-1932
 
- Other Models
 - 
        
Here you find 9 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Marathon Radio Co.; (where?)