Serial Number

Can I verify the Serian Number for AP2 irons online
You can call us at Team Titleist and we can let you know if a club has left here with that number. Unfortunately, because counterfeiters copy legitimate numbers, once a club has left the account that we shipped it to, we can only tell you the original specs that the club had when it left here.

just purchased a set of ap2...4-pw , they all have same serial number but the 7 iron... what does that mean?