Review of The Black Pit of Dr. M

I remember years ago, I saw this movie at a drive-in in Portland, Oregon. However, I thought the title then was "The Black Pit of Dr. X," and it was in English. I remember the part where the disfigured doctor returns from the grave and starts to play his violin. At that point I left the theater. Ever since, I've wanted to see it again to know how it ends. So there was at one time a print of this movie in English. Whether it is available now is another question. If anyone knows of an available copy (in English or Spanish), I would be interested in checking it out. I would also be interested to know if anyone has seen it recently (within the last few years) and where he/she saw it. Thank you.