WITH MICKEY MANTLE SIGNATURE ON SIDE PANEL. BALL WAS OBTAINED BY A LOCAL GENTLEMAN IN THE EARLY 1950'S WHEN HE & A GROUP OF LOCAL UNITED CEMENT WORKERS UNION, AFL-CIO MEMBERS VISITED YANKEE STADIUM & WERE GIVEN A TOUR WHICH INCLUDED YANKEE CLUB HOUSE. EACH PERSON WAS ALLOWED TO SELECT FROM A GROUP OF AUTOGRAPHED BALLS ON A TABLE IN THE CLUB HOUSE & THIS BALL WAS SELECTED & SUBSEQUENTLY GIVEN TO HIS SON WHO HAD IT IN HIS POSSESSION SINCE. THIS BALL HAS RECENTLY BEEN REVIEWED BY A MAJOR GRADING FIRM & A MAJOR AUCTION CO. & IN THEIR OPINION THEY DO NOT THINK THE SIGNATURE IS A VALID MICKEY MANTLE AUTOGRAPH. THIS IS STILL A NICE ARTIFACT FROM THE PERIOD ALONG WITH AN INTERESTING HISTORY ABOUT IT. THIS BALL CAN BE CONSIDERED A CLUB HOUSE SIGNED BALL