Hi Don,

You perhaps already know that ref but, just in case, here's the link to How Bells are Made -How it's Made :
Jingle Bells machine making starts at 1'15" .

https://www.youtube.com/watch?v=DfJC-0s8qIo

Like you, I also think that there is a lot of testing to get a good looking result.
And the resulting blank shape would probably not suit press forming process, 3 steps press mold bending.

Where you thinking of designing blanks for a mold to make some jingle bells ?

Happy Holidays !