Mysterious "sword"?

This was in my grandfathers gun safe, I received it with some guns after he passed away. I haven't a clue in the world who it belonged to. The blade is 22.5" long.

There is an inscription on the flat part of the blade. This is all I can make out from it because some of it is worn away.
"M___de Mukig ( or Mu_iy) 1868" before the date there are some letters and two of them are underscored twice.

Markings on the sword handle: H 38921, a diamond with a B in the middle, an oval with a crown over a G, an oval with a B in the middle, and two others I can't make out, one looks like an oval with a crown and a 14 or M. Those markings are on the curved part of the sword handle that is a white metal.

Markings on the brass colored part of the handle: a shield with what looks like the number 14 (or an M) inside it, an S and what looks like a 2 and an A.

On the blade near the handle: an oval with a C with what looks like a star above it, another oval with what looks like another C and a mark above it, but it's mostly worn off.

On the scabbard (i guess thats what its called, the holder that attaches to a belt maybe): H 38921 and at the very tip of it there is what looks like a 5.

I know the pictures and info aren't great. I can take better pictures Sunday when my daughter gets back from spending the weekend with a friend.

ANY info would be great! We have no idea what family member it belonged to. Thank you all!

What category do I put this under?? lol