I'm getting the impression that a lot of red (though a very orangish red) kinkeshi end up casting smaller or undergo some shrinkage.
Looking at red ones, from three different people or lots, several are a little smaller than the MUSCLE or other color kinkeshi of the same figures, but still larger than the 29th anniversary reissue. They seem legit as the Y/S NT on the back is perfectly clear. Also a Kinnikuman Soldier (A) is oddly stiff for vintage kinkeshi, especially his right arm.
Also how many official colors do they come in, not counting odd special clear ones?
It seems the standard are flesh, red, blue, yellow, green.
So are more salmonish or light orange ones just faded red? And therefore safe to keep together?
I have a very light keyman that I just think is an extremely faded flesh.
Most mysterious is a very beige or taupe color Skyman, that's darker than flesh and substantially different from any yellow.
Smaller darker yellow, certain orange, and certain blue ones seem to be obvious bootlegs even if the Y/S NT is clear.