Flip Stock?
 

Over the last few years, Topps Heritage has had SSP Flip Stock parallels where the front is printed on the gray back stock and the back is printed on the front white stock. I think the stated print run is something like 5 copies.

By now everyone has seen blank fronts and blank backs, but has anyone else seen examples of flip stock cards naturally occurring in the wild? I was unaware that these were a legit thing at some point until a few months ago when I acquired a 1988 Topps Cory Snyder for my Snyder PC that was like this, and I was just wondering how many more might be out there.

I'm always on the lookout for any Cory Snyder ones (as well as blank fronts and blank backs). And if anyone wants a photo of the Snyder one I have, I can provide it here.

Definitely post. There are all kinds of mistaken printer sheets that sometimes get taken home and cut up, and some even get pack-inserted.

I have quite a few 1988 Topps also, for some reason they are fairly easy. I have a bunch that are overprinted scrap ( not wet sheet transfers) but flipped perfectly are not common outside of 88’. I might have some others but it would take a bunch of digging to look for them.

"Natural" flip stock cards that were circulated are probably the rarest print freaks to find. I have one:

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