Hi Gregor,
I think the blade is Japanese, late WWII production, not true Nihonto, just tool steel with a sharp edge. The koshirae are either older or WWII civilian mounts, or a mixture of the 2. The tsuka has been rewrapped by someone who doesn't know how. In current condition a retail price might be about $400 or so, plus whatever the tsuba it comes with is worth.
The tsuba are all real and seem to be OK or better. I can't put a value on them without better pictures and more information. If you'd like individual advise contact me by email next week (after the San Francisco show) and I'll help if I can.
Cheers, Grey gdoffin at cpinternet.com