Nice mounts (Fuchi-kashira)on the handle. The black part of the metal (Saku)is a copper and silver mix that makes a very stable black color, hard to do with metal, the gold color is a gold plate over the saku. The menuki (the pieces under the wrap) appear to be the same. I would like to see more close ups.
It would be easier to guesstimate an approximate date of the blade if I could see the tang, (the unpolished metal part of the handle under the tsuka ,grip,)
It appears to be an older blade. The sword gaurd (tsuba) is a nice old iron fighting tsuba probably Edo period (1600 to 1860 AD).
While it is not pristene as you have pointed out it is still a nice Katana (long sword). Good old Samaurai swords like this one are getting very hard to find.
There are artists that can rewrap sword handles for around $200.00 or less. I think it would be a wise investment to make. It improves the appearance display of the blade. As you said not pristene. But a treasure indeed. I like it.
Steve

"Insanity is heriditary. You get it from your kids." Quote from Ronald Regans diary.