Disassembled, cleaned, painted (lacquer!) and have begun, slowly, to reassemble the hotel phone. First, a collection of chassis parts -- the things in the center are the back of the transmitter (microphone) and the receiver (earpiece) hook: Basic assembly -- the front of the case is hinged to the back and I have test-fit the network, bell and hookswitch (less hook; it goes in later). Shown with a few of the tools used, including pen-type oiler at far left, used to put one drop of light oil on the hookswitch pivot (funny shading is the lighting, mild orange-peel texture is deliberate):No dial, receiver or transmitter yet. The latter is a whole collection of small parts, most of which I still have to clean and polish. Dial, hookswitch and receiver will be the very last parts fitted.
I did manage to remove and photocopy the schematic. Here's a black & white scan: Click for larger -- I have it larger still and in color for more detail, if anyone else is working on a Kellogg 1155-A or 1157-A telephone.