No, and no. With all the museum websites and nihonto dealer websites and nihonto chat websites and nihonto information websites and nihonto books available there really is no excuse to get things like this so wrong, other than mistaking temptation for opportunity. Don't feel too bad about this, instead, turn this into something positive and take this as your initiation fee, tuition, lesson learned. The key is not to repeat the same lesson over again, keeping in mind that in addition to outright reproductions there's a lot of 'real' but 'old junk' just the same for sale out there that presents additional bumps and potholes on this path of collecting and learning. Study the good stuff.
Sorry legitimate dealer said it was genuine so there you go. I'll fly it by some other sources just for the heck of it. Either way I'm not crying over a small mistake. Thanks for you inputs