Steamboy

Ray is a young inventor living in the U.K. in the middle of the 19<sup>th</sup> century. Shortly before the first ever Great Exhibition, a marvelous invention called the "Steam Ball," behind which a menacing power is hidden, arrives at his door from his grandfather Lloid in the U.S. Meanwhile the nefarious O'Hara Foundation has sent men to aquire the Steam Ball so that they can use its power towards their own illicit ends.

Synopsis from Anime News Network