Back in the '80s-'90s when I was refurbishing a mountain of Dynaco Mark II and Mark III power amps I had a bunch of Chicago USA made bell ends powder coated with tough Sherwin-Williams Polane T finish to replace the ugly, rusty originals. These bells fit both the A-431 output transformer and the P-782 power iron. There are quite a few Hammond etc. transformers that will also accept these bells. If you're working on a project that needs respectable looking bells here they are. You should use little plastic inserts on the screw holes so you don't mess up the nice finish.