Description:May 20, 1965 Eddie Mathews 453rd career home run attributed baseball (Grand Slam). Spalding W.Giles Official National League baseball showing expected use/wear and soiling. Period ink notation reads, "#453 Grand Slam Warren Spahn 5/20/65" (end of date is very faded). The Braves played the Mets at Milwaukee County Stadium and Mathews hit his 453rd career homerun off Hall of Famer Spahn in the 5th inning, a Grand Slam. Includes letter of provenance from the original recipient of items from the Mathews family: EX