Following the numerous post I've put up over the past couple days, here are some more interesting memorabilia related directly to Jackie Robinson available at Goldin's current Jackie Robinson Foundation auction.
This is a rarity. Above is a Jackie Robinson game-used 1955 World Series bat. (auction link) As was custom, Hillerich & Bradsby created this series specific custom bat for Jackie to use. Below is a circa 1955-56 Brooklyn Dodger cap attributed to Jackie Robinson. (auction link)
Among the throngs of original paintings featuring Jackie Robinson that are available in this auction the below three are my favorite.