DeForest 500 (Gernsback : Radio 3 P: 452) |
£1.80 (~ $2.20 or €2.10) |
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Country | USA |
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Manufacturer | DeForest Radio Telephone & Telegraph Co. (De Forest); New York |
Alternative Name | Lee De Forest Mfg. |
Model | F-500 Rheostat - DeForest Radio Telephone & |
Year: 1932 | Category: Rheostat only |
Initial Price | 1.20 $ |
Source | Book: Gernsback Vol: 3 Page: 452 |