Manchester United Man Utd 1998/1999 Treble Winning Season Signed Football. Around 19 signatures, see pics. The item “Manchester United Man Utd 1998/1999 Treble Winning Season Signed Football” is in sale since Sunday, March 1, 2020. This item is in the category “Sports Memorabilia\Football Memorabilia\Autographs (Original)\Signed Balls”. The seller is “misterwilts” and is located in Warminster…