theoldcrow, 6 years ago Hi, I have a Kellogg wall phone that is identical to this one. I found it about seven years ago. It has all of the insides complete, with paper diagram on inside back of the door, and a Serial # A 26522 C on the left side brass piece. Could you tell me the age and approximate value? I would appreciate any further info you might be able to relay on to me. Thanks so much. Carol.