| Sparks-Withington Co. | |||
| Model: 506 | Chassis: | Year: Pre November 1935 | |
| Power: | Circuit: | IF: | |
| Tubes: | |||
| Bands: | |||
Resources:
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| Beitmans 1946 134 | |||
| Riders 6 (VI) SPARTON 6-7 | |||
| Riders 15 (XV) SPARTON 15-1 | |||
| Riders 15 (XV) SPARTON 15-2 | |||
| Riders 15 (XV) SPARTON 15-3 | |||