This is a rare and highly sought-after 1963-67 Sport Hobbyist Christy Mathewson trading card graded SGC 6 EXNM with a population of only 1. Additionally, 2 graded cards are listed as having been graded higher, making this card a valuable find for collectors and fans of baseball memorabilia. With its historical significance and limited availability, this card is a must-have for any serious collector looking to add a unique piece to their collection.