This particular piece will instigate the creative side of me as it will turn up in a light weight alloy very soon.
Keep posted as I walk you'll through the process. You won't believe how I will forge the various concave and swaged shapes of the horn ring and center dome.
Some times there are things in house hold catalogs, hardware stores and other sections of automotive items that lend themselves nicely to your projects. The center faceplate with the CORONET title will have to have the letters laser cut by a good friend in the metal business.