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Unicoil bell in general use from late 1970's onwards.
This bell was first seen in the bell unit associated with all the Compact telephone
variants. See Telephone No. 776 for more details.
The bell can also be found fitted with a volume control lever. See
Telephone No. 746 volume control and
Bell Unit No. 776.
Bell No. 79A - no connecting wire.
Bell No. 79A-1 - 6 inch connecting wire with spade tags - 1000 ohm version (1/DCO/1028).
Bell No. 79A-2 - 2 inch connecting wire with spade tags - 1000 ohm version (1/DCO/1028).
Bell No. 79B - no connecting wire.
Bell No. 79B-1 - 6 inch connecting wire with push on connectors (used on Bell
No. 80B).
Bell No. 79D - 4000 ohm version.
Bell No. 79D-1 - 6 inch connecting wire with spade tags.
Bell No. 79D-2 - 2 inch connecting wire with spade tags.
Bell No. 79E - no connecting wire.
Bell No. 79E-1 - 6 inch connecting wire with push on connectors (used on Bell
No. 80B).
Drawing - 93053 (initial date 1969).
Drawing - 93805 (initial date 1977).
Specifications - S1128 & S1495.
Bell No. 79D
Bell No. 79 with the optional volume control lever
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