There are two of these oversized hard stock cards.
I have pics of the other one that has Andre The Giant, Kerry Von Erich, Stan Hansen, Bob Backlund and a few others on one side and a large photo of Ric Flair on the other. The one you are showing has a large photo of Tiger Mask on the back.
It is hard to know if the other pictures that appear to look like cards actually were ever made. So far only six cards have surfaced and they did indeed come in little packs in vending machines. Years ago some guys from the CU board opened some and those were the first to ever be documented here in the US.
It seemed they were not that rare but time has told a different story.
Edit: I forgot I just bought another one recently. My first copy I got Flair to sign. Here is the link to the one I purchased.
https://www.ebay.com/itm/1983-Cosmos...72.m2749.l2649