missing serial number

I just received a set of AP1s after getting fit by the tour van. Based on the recommendation of my fitter, my shafts were cut 1/2" short across the board. I just played my first round with them and I was cleaning my clubs at home after the round. I noticed that all of the clubs (4-PW) have the serial number etched into them but for some reason my GW (which came w/ the set) did not have that serial number in it. Does that mean it was not shortened like the rest of the set?

Hi Jason,  Can you give us a call with your serial number?  1-888-TITLEIST (888-848-5347)

Hi Cathi,

I brought the club to Haggin Oaks last week like you suggested so that they could send it to you to get the serial number put on the gap wedge. Is there a way for me to find out when I can expect it back?

Hi Jason,  Your club did come in and should be leaving today.