That is a tough call. They aren't cards that slipped through the back door, but were distributed upon the liquidation of the assets for both Fleer and Pacific. There are a ton of Fleer ones like that. Parallels without the serial numbers meant to replace damaged cards for collectors.

The tough part is that they do exist, but unless we have seen one, there is no way to know which ones exist. They are out there so I guess they should be added.

I have a couple of them so let me know if you are going to add them.