Question for Super Bowl Ticket Sub Collectors....

[camarokids]

I bought my first Super Bowl Ticket Stub. It is from SBXXV in Tampa, Fl.

My question is I see a lot of Replicas for sale on ebay and am wondering what is the difference.

The one I bought does have the "WW & L Safety" Watermark on the reverse.

Is this the way to tell a real vs. a replica????

Thanks!