| Sparks-Withington Co. | |||
| Model: 4972 | Chassis: | Year: Pre 1951 | |
| Power: | Circuit: | IF: | |
| Tubes: | |||
| Bands: | |||
Resources:
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| Riders 21 (XXI) SPARTON 21-2 | |||
| Riders 21 (XXI) SPARTON 21-3 | |||
| Riders 21 (XXI) SPARTON 21-4 | |||
| Riders 21 (XXI) SPARTON 21-5 | |||
| Riders 21 (XXI) SPARTON 21-6 | |||
| Riders 21 (XXI) SPARTON 21-7 | |||
| Riders 21 (XXI) SPARTON 21-8 | |||
| Riders 21 (XXI) SPARTON 21-9 | |||
| Riders 21 (XXI) SPARTON 21-10 | |||