WILLIE MAYS - MICKEY MANTLE - DUKE SNIDER AUTOGRAPHED FIRST DAY COVER. WILLIE MAYS - MICKEY MANTLE - DUKE SNIDER AUTOGRAPHED GATEWAY STAMP FIRST DAY COVER. OFFICIAL COMMEMORATIVE COVER - BASEBALL IN AMERICA. POSTMARK JANUARY 14, 1989 - ATLANTIC CITY, NJ. This item is in the category "Sports Mem, Cards & Fan Shop\Autographs-Original\Baseball-MLB\Other Autographed MLB Items".The seller is "billdanielssports" and is located in this country: US. This item can be shipped to United States, Canada, Australia, New Zealand.