I think you are safe. The copyright stamp on mine is almost identical except for it lacking the 'Made in China' bit and the other arm doesn't have a stamp.
It's fine.
By the way, congratulations on getting the Liokaiser!
BTW: I just checked by European Killbison and the copyright stamps exactly matches yours. It is now confirmed that yours is legit since the Chinese probably used the European Rescueforce molds.
