No, they're not plastic, or "stone painted bronze," or Photoshopped . . . these are real items that appear to be more-or-less identical to the alleged "Roman sword" from Nova Scotia. The "lost Roman legion" explanation has a really difficult time dealing with the fact that more and more of these things keep showing up. My 19th century tourist souvenir hypothesis, however, accounts for all the facts (and all the swords) that we currently have in front of us. My hypothesis has no trouble dealing with the appearance of additional swords, and, actually the more swords the better! "Roman swords" seem to be a growth industry these days!
The appearance of more and more swords is not so good for the alternative hypothesis, however.
Here is a link to Geuzen's image.