Tosogu No Kigen by Sasano Masayuki. This book was published in 1979, however I think that up to this point it has never been used. So it is perfect condition. There are some small damages to cardboard slipcase.
Book is in Japanese but each item has long description in English. You can buy a full translation of this book online.
Good quality black and white pictures of tsuba, kogai and kozuka.