According to eye-witness, William Jenkinson of PA, Mickey, in a game against the Willy Mays All-Stars, hit a virtual twin of the July 6, 1953 home run.  Mr. Jenkinson states that it went 10' over the P on the Philco sign on the right side of the roof and probably went about 535'.  This P was very close to the 400' mark and the top of the sign was 10' above the roof.