Thanks, that worked beautifully.
Photo now on "latest photos".
Brian V, I prised the old bezels off from the rear of the instruments with a small screwdriver. On one or two of them I had to shave a tiny bit off of the rim to get the chrome bezel to fit, I used a Dremel fitted with a fine grinding stone to do that. With the instrument face down on a table and a piece of cloth I folded the new bezel over the rim of the instrument using the blade of a wide(ish) flat head screwdriver, slowly working around. The rear of the instruments probably don't look as tidy as if it had been done with a folding tool but once installed you can't see it anyway. I'm very happy with the finished article and defy anyone to tell that they weren't original or professionally done.