Mid/late 1960s — Main character loses one side of his face

I saw this movie in a theater in the mid-1960s — probably between 1964 and 1968.  It was in color.  It was a science fiction/horror movie and the main character was a young man who looked human but at some point in the movie one side of his face got torn off and you could see electronics beneath.  I think the young man was an astronaut, but I’m not sure.  My older brother thinks the  young man was supposed to be a Frankenstein-like character.

There was also a large dinosaur like monster in the movie.

5 thoughts on “Mid/late 1960s — Main character loses one side of his face

  1. Solved! That’s it! This movie is not in color, but all descriptions I’ve read and the parts that I’ve seen on YouTube all match what I remember! Thanks so much!

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