I just watched one of the History Channel series about "The Men who Built America."
Some of it was fascinating, but of course, the so-called "History" channel often gets it wrong. One must always watch out for "facts" that aren't, exactly. The episode involved Edison (proponent of D.C.) versus Westinghouse (proponent of A.C.) and the ensuing rivalry, abetted by J. P. Morgan, who backed Edison.
At one point, Morgan stands transfixed in Edison's laboratory, -- in the late 1870's one assumes -- watching a 1950's era Lionel steam engine model, without a tender, go around and around on an oval of three-rail 027-profile track. The train is powered by what appears to be a Lionel model 1015 transformer, which, of course, relies on alternating current for operation.
Mr. Morgan, enthralled by the 1950's toy, directs Edison (or perhaps Mr. Tesla, who was employed by Edison) to make one available the next morning. Easier said than done. as J. L. Cowen was just a wee tot, having been born in 1877, and neither of the protagonists in the "current war" had invented a reliable time machine at that point in "history."