Cristiano Ronaldo – Signed Manchester United 2006/07 Jersey – Beckett Authentication - Manchester United jersey in the 2006/07 season design, with RONALDO and number 7, signed by Cristiano Ronaldo on the number. The signature is accompanied by Beckett Authentication Services (BAS) authentication. An impressive collectible from an important period in Ronaldo’s career, in a season when he won the Premier League with Manchester United.