See, and read, the post from another forum:
http://swordforum.com/forums/showthread.php?p=138345
Please look at the pictures at the top, these daggers are sold around the world as anything between 17th to early 20th C period items. It's ok for people who collect knifes (and not antique knifes!). Absolutely nothing wrong with it. Whats important is to realize that it takes more than the presence of chiseling, inlay, form, shape, stamp, the reference picture in the book etc. etc. to determine the
authenticity.