Stromberg Carlson 121
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| Switchboard ID | 5 |
|---|---|
| Manufacturer | Stromberg Carlson |
| Model | 121 |
| Years Manufactured | 1960-1969 |
| Switchboard Type | Common Battery |
| Switchboard Application | PBX |
| Last Service Location | |
| Special History | |
| Switchboard Description | 5 Trunks |