Very impressive and beautiful. We I grow up I will have one just like it.
I am in the "scabbard is later" camp. (if you need a silver scabbard.....

)
One other point Charles, the gems at the top of the hilt appear to be later additions, say no earlier than the late 19thc and they are in Eurpean, possibly British or American work. The silver mounts are not those used by the Ottomans or Indians.