2021 Topps Heritage Baseball Forum

That is exactly correct. If it is a variation of some kind weather it be straight image variant, or flip stock, nickname, error info, and so forth, the card will be backwards (flipped over) when you find it in the pack.

I don't really collect Heritage, but isn't it the one product that Topps consitently tells you waht the parallel is? I thought they usually put the variation on the back for the ones that are harder to tell like that.

Two different things. Variations are different within the set. Parallels are separate sets altogether. You're right that Heritage is the produce that has the variation name on the back (Color Swap, Image, Name, whatever), but that's for cards within the set that are different. 

The Flip Stock is a parallel set. Thus, the only cards denoted as anything will be the variations (if any) within the Flip Stock set.

In the end this all probably doesn't even matter. The flip stock parallels are limited to 5 copies so the odds must be insane on actually pulling one

you could be right but i did pull one from the high numbers today and i can feel the difference and it too was turned backwards in the pack