Curse of the Demon (1957)

The titular monster from The Curse of the Demon (called Night of the Demon in the U.K.)

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From Wikipedia:

Night of the Demon is a 1957 British horror film directed by Jacques Tourneur, starring Dana Andrews, Peggy Cummins and Niall MacGinnis. An adaptation of M. R. James‘ story “Casting the Runes” (1911), the plot revolves around an American professor investigating a satanic cult suspected of more than one murder.

The film’s production was turbulent due to clashing ideas between producer Hal E. Chester on one side and Jacques Tourneur and writer Charles Bennett on the other. Against Bennett and Tourneur’s wishes, Chester demanded the demon have a highly visible presence on-camera. The film was also edited further in America in its 1958 debut under the title of The Curse of the Demon, as the second half of a double feature to accompany the film The Revenge of Frankenstein (1958).