A short Katana

[fernando]

I have just learnt some (?) of the lexicon used in this weaponry, in order to try and query on this on this sector.
Probably this specimen i have just bought is a so called Wakisachi ... the blade is 44 cms. long.
The dual efect in the iron guard ( Tsuba ... ) looks like the Yin-Yang chinese symbol, which gets me lost, as i can't figure further on.
The all set is damaged ... the blade was subject to heavy misuse.
Various parts missing ( fuchi-kashiro (?) and other ).
Any member within this area, to give me a little push, both in possible age and classifying?
Thanks a lot in advance.
fernando