Looks like we're a victim of copying a checklist from another site without reading everything on the page.
A little investigation shows that these cards are autographed, but have no SN even though a checklist on that exact same page shows the cards as having SNs. (But the Stats Zone area shows a big old ZERO for number of cards SNed in the set.)
I would imagine that the numbers represent the PR. Obviously, they are not a SN. Thanks.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).