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The operating company installed a frequency selective ringer for party line use or straight line ringer, as needed. |
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Western Electric 591B Single Line Supplied to the operating company with no ringer. This one has a frequency ringer installed for party line use. These were rarely used within the Bell System. (Photos courtesy of Michael Richman) |
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No Bell System Markings. The case and handset have only the Western Electric logo. (Photos courtesy of Jonathan Sowers) |
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Western Electric 593B Single Line Supplied to the operating company with no ringer. This ivory set has a standard straight line C4A ringer installed. The top insert is the marking on the outside of the backplate,
and the lower (with date) is inside. |
