Comic Images was one of the most popular trading card manufacturers of the 90's, releasing a variety of art-based sets across the decade. By 1993, the company was creating sets with a 90-card base set, a 6-card chase subset (3 per hobby box) and a rarer 3-card chase subset that was rarer than 1-per box (maybe as rare as one complete subset per case).

Several of the rare subsets that came out around 1993 had the "spectrascope" layer providing a 3D effect. It appears Comic Images printed up many more of the cards intended for being spectrascoped so it offered the extra unfinished, uncut 3-card strips that were also blank-backed to dealers. It doesn't appear that these strips weren't widely known about because you don't see most of them listed in older, more comprehensive price guides nor even the excellent online equivalent, Jeff Allender's House of Checklists.

This one shows the 3 rare cards that were planned for the "Ania" set (1993) plus the finished chase card. As it turned out, Comic Images cancelled the set but did give away the chase cards it had printed by that time (3 spectrascopes and 3 chromiums).

It appears collectors weren't very interested in these strips in the 90's. Comic Images started giving away what they had left by the late 90's. I got an Olivia III (also from 1993) one when I showed my Comic Images Collectors Club card at their booth at the 1998 San Diego Comic-Con.