Only a Coffin (1967)
aka The Orgies of Dr. Orloff
aka El enigma del ataúd
Genre: Crime | Horror | Thriller
Country: Spain | France | Director: Santos Alcocer
Language: Spanish | Subtitles: English (Optional, embedded in mkv file)
Aspect ratio: Widescreen 1.85:1 | Length: 91mn
Dvdrip H264 Mkv – 951×530 – 25fps – 1.46gb
https://www.imdb.com/title/tt0060373/

A doctor invites his relatives to his castle, all the while planning to murder them when they arrive. However, when he himself is found murdered, the relatives know they have to find the killer before he gets them all.

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Only a Coffin (1967)