1920's German motorcycle handlebar mounted horn button; I don't know the maker.It is missing one of the nuts for the strap (easy to make) and is otherwise complete and ready to use. Made of brass and steel.I can post this, and I accept PayPal.
1930's era Bosch 6V FD6D S22 horn, with its original mounting bracket.It works well, but is missing the bakelite contact block.I can post this, and I accept PayPal.
Nonpareil brass horn with double twist. Good condition with a couple of small dents. Works extremely well when blown through. 16cm across bell. complete with mounting bracket. More photos available. Paypal as payment option. Will ship worldwide
SONABEL Type BOF Horn Compressor, 6V I guess for a complete horn you also need the pneumatic horns, that would be connected using a firm hose to the outlet of the compressor.