Twins Daily had the link to a 1959 vintage Home Run Derby between Harmon Killebrew and Willie Mays. Harmon was in his Senators Uniform and I remember listening to that team on the 1955 Buick radio when we lived in Florida. The car radio was able to pick up WTOP in Washington at night but it wasn't perfect and I remember getting upset when it would fade during a key part of the game. That team is the reason I am now a Twins fan.
What "struck" me about the derby was the dimensions of the minor league park they held the derby in. 340 to right and left, 412 to center with about a 10' high wall. The other thing was how similar Killebrew's and May's batting stance was. Almost carbon copies. Too bad they didn't have forceplates in those days. Another refreshing thing to see was how low keyed and humble both players were and were genuinely happy to get the $2,000 for Mays, who won, and $1,000 for Harmon as opposed to today's $50K per at bat. But it was 61 years ago; ancient history