Scott 68 Questions

I have this group of stamps, no grills, the middle two appear to be Scott 68's. The left most and right most stamps are a bit unusual. The leftmost has a much clear image and is lighter, while the rightmost has extremely thin paper and is a bit darker than the middle 2. The rightmost stamp when held up to a light source is whiter than the other 3 stamps. Would any of these have the potential of being a Scott 106 re-issue? Or should I just stick them all in as a 68.

Stamps 1,2,3,4




Stamps 4,3,2,1




Stamps 4,1




Thanks in advance for any comments.

no

Deep yellow green on very thin paper is a listed sub-variety for #68. Your #4 is a decent one (care to sell it?). Forget the reissue for the others.