Anyone know what these are? Some of these designs look awful familiar, like classic kaiju. I think there might be an old thread on these, but I would not even know what to search for. What is confusing to me is that these are marked 1958! That date does not seem to jive. Its funny to note that the "A" in USA on some of these is upside down.

all of these except the 3rd one were repainted and re-released in the 90s as "Dino Fighters." here are mine:
https://www.flickr.com/photos/24997062@N02/11984036503/

https://www.flickr.com/photos/24997062@N02/11983736125/

as you can see, the one in the middle of my 2nd pic is not part of the ones you posted. i also have that 3rd one you have, but i have no information abut it:
https://www.flickr.com/photos/24997062@N02/11984140364/

Ahh, yes. Thanks. I knew they were a newer issue, though I forgot exactly what. But its interesting to note that these are actually based off of a vintage toy line that predate most kaiju, although the design is very similar.