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Many of these are externally identical, so check under the telephone for a number. If a number is present then go to the Telephone list and view the 100 & 200 series for pyramid style Bakelite's and the 300 series for the larger Bakelite Telephones. If the telephone has no number but a diagram is present, then subtract 100 from the diagram number to get the telephone number - e.g. Diagram N332 refers to Telephone No. 232.
Last revised: July 25, 2023