Great Scott Antiques
Web site: https://www.greatscottantiques.com/
Not a type I have encountered previously, but a very well put together fighting knife, which looks to have been converted from a socket bayonet.
The hilt looks to have been formed from bronze rather than brass, with ribbed grip section, and serpentine crossguard with ball finials.
7.5 inch trefoil blade, 11.25 inches overall.
There is a makers marking on the blade, which I can't quite make out, but I'm always happy to learn should anybody wish to enlighten me.
Strictly over 18's only. Photo ID will be required before this item can be dispatched.