The Unearthly (1957)

This is the title card from The Unearthly. Please notice the mask, bottom row, center.
Here's the mask from the title card in my collection. Harry repairs a broken nose in the other photo.

New Screen Caps of the Mask
Harry Thomas as a Cellar Mutant?
This is another of Harry's creations.
One sheet poster showing more of Harry's work.