Eyes Without a Face (1960) aka Horror Chamber of Dr Faustus:
A surgeon causes an accident which leaves his daughter disfigured and goes to extreme lengths to give her a new face.
The Manster (1959):
An American reporter in Japan is given a mysterious injection by a scientist, who turns him into a two-headed monster.
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https://www.youtube.com/watch?v=XovdnNtK0eM
An advice columnist in the midst of getting a divorce begins receiving threatening notes from an anonymous stalker. Meanwhile, members of her group therapy session are being murdered by an unknown assailant.
Director: David Paulsen
Writer: David Paulsen
Stars: Klaus Kinski, Donna Wilkes, Marianna Hill
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https://www.youtube.com/watch?v=4Oe55xASZ1o