Club registration

My AP-2 irons and Vokey wedges were custom fitted. The serial number on each club is the same. I was told that number identifies me and my clubs. All Titleist clubs carry a one year warranty, so I would think that number would be needed.

 

What do the individual numbers and letters stand for, what do these digits mean? Thanks in advance

I registered my AP2 but do not see where the specs are listed. Please advice where I can find the specs. Thanks

on my ap2 the number ison the head just below the black hosel