Kellogg - Handset - E2 shsdchildproduct This transformer kit should not

This transformer kit should not be used with your phone until you confirm that the yellow and black wires from the modular jack on the phone are connected directly to the light circuit in the phone

Emits a pleasant electronic tone

It is then painted with a gloss black enamel

Manufacturing licenses of the "2500/2554" designs were granted to a number of other companies as well

Kellogg - Handset - E2 shsdchildproduct This transformer kit should notOriginal Kellogg E2 Handset with receiver and transmitter elements. For use with Masterphone 1000 (redbar) and Ashtray phones. Has "Kellogg Switchboard & Supply Company, Chicago U. S. A." stamped around the transmitter cap.