I decided to entrust Museum conservation team, great people with great skills. We decided to recover handle, while the patina and small rust could be only partially removed from the blade – this will be always a little dark, I think, but the brass inlay was nice recovered. And this are the results: new leather on the handle with string beneath, and brass strip as I saw on other examples (found on this forum by the way). Hope it looks good now. In the future, the horn will be preserved, especially that corroded one, and maybe even restored thanks to know methods.
I know it is not superb piece, but if you don't have what you like, you like what you have
I would like to hear your precious opinions about this weapon, thanks!
PS. Thanks to Ariel for first opinion which helped me to make decision about this one
PS. Sorry about pictures quality, I was in hurry.