910 D3 with no serial number

I recently purchased a 910 D3 10.5* head that was reportedly from a Titleist Fitting Cart. When I received the head I noticed there was no serial number on the heel of the club.

Basically I am wondering if the Fitting Cart heads came without serial numbers or could this possibly be counterfeit. A magnet doesn't stick to the club and the markings are identical to my 8.5* head that I know is legit.

 

Please help!

hi, a similar question, I bought a 913 d3 from a golf shop in Ireland today - I was suprised to see no serial number on the heel of the club - Is this possibly a fake club??

regards

rob