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Unused Mint Condition with a protective black plastic coating on the plugs (easily removable.) Single Module ONLY Buy one or several while quantities last. These are difficult to find. glowing lamp when a user rings in to the operator.. Useful when the sound is turned down or off on the TA-312, TA-43, or the TA-1 field telephones. Use these as a glow lamp for the TA-312/PT, TA-43/PT, as referenced in the TA-312/PT Operatorer's and Unit Maintenance Manual TM 11-5805-201-12, page 2-8, and 2-9 dated 1 August 1990 and attached photos to depict these in the glow lamp mode. Can also be used with the TA-1/PT as well.