These are the 9 "mirror foil" cards released by Unstoppable, in June 2016. These cards have a shiny reflective foil surface, although faces and hands are not reflective. It is an odd effect, frankly pointless.
Early promotion flyers promised "Rainbow Foil Base chase cards" and "Reflecto-Mirror (TM) chase cards". These cards seem to be the latter; the former (with a rainbow colour effect) do not seem to have been released.
The back text is identical: "Congratulations. You have found a limited edition Space: 1999 Mirror Foil Card". There is a smaller sized version of the main picture (often cropped a little differently- some closer, some wider). The front pictures are mostly promotional poses, all in portrait dimensions.
Contents copyright Martin Willey