There were numerous creases in the bell flare and heavy tarnish on the inside of the bell, which had been Silver-plated.  There was a crack along the edge of the bell in the Garland that was about 3 inches long.  The patch for it was made of a flat sheet cut to a curve to match the bell.  It was then bent around the edge of the bell and burnished to fit.  There are three relief cuts to keep the patch from becoming creased.  Once it fit well, it was soldered in place.

The mouthpipe had a pretty severe bend in it that had also creased the sleeve covering the pipe.  Kruspe Horns are made with tubing that is seamed from a flat sheet.  This seam tends to fail, since the brazing alloy used is high in Zinc and corrodes easily.  This is what happened just before the water key on the mouthpipe.  Also, a patch was necessary on the third valve F slide for the same reason (sorry, no picture).

Here are some pictures of where the original thumb rest and key should have been and the pieces of the key itself (with another view of the bent mouthpipe).  The original key was very thin and had broken at the linkage.  The key itself had frozen to the axle rod, which had become so rusted that it snapped during removal. 

I made a new key rest for it, which I made to look like the rest for the three main keys.  The new key was made of round bar stock with pivots made of Aluminum Bronze, an excellent bearing material, to ensure long life.  The plate on the key was made of 16 gauge Nickel Silver, shaped to fit the thumb.

Most of the dents in the Horn were in the bell between the throat and the finger hook.  At one point the metal had cracked from fatigue and required a patch.  I tried to make the patch as unobtrusive as possible and thinned out the edges so it would not stick out too much from the instrument.

Here are a couple of nice views of the finished instrument.