Noting only one post about Aurelia horns, and not manufactured by the expected maker M Marelli. I decided to do a quick check, hooked up to a battery, one worked, 2nd didn't, even after a few taps of the hammer ( see small pile of rust!)!
Majestically named as "Klaxon Jericho", and made in France to boot.
Anyone shed any light on why not as expected maker and likely cause of a failure to "parp!
P