Those are stickers for the red key, laverdajota, not the emblems for the black flip-key.
The black flip-key has an emblem with some weight to it - I think it's made of metal, not plastic - embedded into the plastic on one side of the key. Underneath it is the little screw that holds the key together. Some that I have seen have a full-colour emblem and some have a black-and-white emblem.
Both my keys are missing the emblems (I have the emblems) as I have had to remove them to get to the screw to open the key to solder on a broken-off button or to adjust a metal contact.
What I'd like to know is what kind of glue to use to stick the emblems back on. It needs to be strong enough to hold the emblem in place firmly, but also weak enough to allow the emblem to be pried loose if needing to open the keys up again.