Per Terry's request, here goes (and I've got Fig. 192 from the service manual in front of me): With considerable effort, I was finally able to pry the "medallion" off the steering wheel, i.e., the "medallion" is the entire assembly, which is the heavy metal circular piece, in which the plastic "K" piece is enclosed. There are three small screws on the back side of the medallion, positioned (as in a clock) at Noon, 4:00, and 8:00.There was no "retainer band" or even remnants of one visible. I do not have a "horn ring," so the next piece was the "contact plate" that turns slightly to catch under the three ridges of the "spacer". The "spacer" is permanently affixed to the "ground clip." Behind the spacer is the round "pad," which is worn, but not totally shot. Then of course, there is the nut in the center of the "ground clip" that holds the steering wheel on, and the "horn blowing cable" is in the middle of that nut. What I DID see between the "contact plate" and the "spacer" were the remnants of a thin gasket-like piece that may have been heavy paper or even leather. I manufactured a replacement piece to fit around the three ridges of the "spacer"; it's thin enough so that the "contact plate" fits in and turns properly to fit on top of the "spacer". Bottom line: I am still at a loss as to how to get the medallion back on, short of gluing it. It WAS on there, but the three screws in the back of the medallion were attached to the three corresponding slots on the "spacer." HOW, I will never know. I hope this helps in the diagnosis, guys.