It is verified that there are TWO Checkered Flag Prizm signature cards for Dave Marcis out in circulation. One copy has the 1of1 insignia on the back and the other does not. This means the backup library copy that Panini would use to replace the original in case it was sent in on a quality assurance case was accidentally (or not) included in packs. This might not be the only instance of dual 1of1 autographs from Select being out there as the Brad Keselowski Signature Paint Schemes Checkered Flag auto I own does NOT have the 1of1 insignia on the back. This presents the possibility that another copy of this auto with the 1of1 insignia is still out there.