Who is mil mascaras with his mask off?

Mil mascaras almost lost his mask in the 70's

When he was pin down by three wrestlers. They had him pin down with his face facing the floor of the ring. One wrestler was on his back while the other two were holding down his arms. The one on his back almost manage to pull off his mask, he almost took it off. Mil mascaras face was all visible the mask was above his eye brows, but santos and blue demon save him from losing it completely.