Ooooh - Shiney!
Nice nimcha. distinctive hilt. did you clean it up?
they seem to be made with a variety of european blades. try doing a forum search here on nimcha for loads of info. even a google on nimcha brings up loads.
here's one from the maritime museum in london:
i've wanted one of those for ages, but always seem to lose out on the auctions....ah well, always next time.