I found this review of the blu:
"A few words about...™ Mr. Sardonicus -- in Blu-ray
William Castle's 1961 Mr. Sardonicus is typical Castle horror, and that's an okay thing. Definitely low-budget, and black & white, it gives the requisite shocks, and is well...
okay. I would presume that the target audience was originally young to mid-teens.
I've seen it in varying incarnations over the years, but finally for fans of the film, we have something special. Special for fans. As a Columbia picture, just typical.
Which means an absolutely perfect presentation.
A perfect gray scale, with admirable blacks. Tight grain structure and resolution that's sharp as a tack.
So where are we.
An okay production, a fun little gothic-ish horror film, but nothing extraordinary, in the form of a Blu-ray that can knock the socks off most every film of the era on the format.
Again, for fans, it's under $10, which is a great price. And you get The Brotherhood of Satan with it. Free." (Robert Harris)
Many people want it for The Brotherhood of Satan btw.
I hope it's region free,if anyone can confirm?