i am trying to work out whats the difference between the 1997-98 skybox premium basketball autographs century marks , century marks non numbered , autographed normal ones
Century marks are hand numbered to /100, silver holofoil font (rainbow like effect). Un-numbered version is the same but no numbering and are likely from Fleer bankruptcy auctions or backdoored through employees. May have been used as replacements.
Regular auto, has normal font and un-numbered.
Some exceptions: Tracy McGrady and Rasheed Wallace only had century marks and no regular auto. Tim Thomas regular auto was never pack inserted but made it out to distribution, and he has no century marks version.