The product is a 1966 Topps Walter Alston signed baseball card, authenticated by Sportscard Guaranty Corporation (SGC). This vintage sports trading card features an autograph from Walter Alston, who was a player for the Los Angeles Dodgers in Major League Baseball. The card is an original from the 1966 Topps set and is a standard size card, making it a valuable and collectible piece for fans of baseball memorabilia.