Dial D for Danger: Chesapeake & Potomac Telephone Co., circa 1919 [HISTORY OF ICTs]
The operators
Chesapeake & Potomac Telephone Co. Washington, D.C., circa 1919.
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Wiring
Chesapeake & Potomac Telephone Co. Washington, D.C., circa 1919.
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Equipment
Chesapeake & Potomac Telephone Co. Washington, D.C., circa 1919.
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