This film fits in nicely to the Euro spy/crime thriller genre typified by movies like Danger: Diabolik, Modesty Blaise and Operation: Kid Brother. The anti-hero, Mister X, is played by an actor who has a striking resemblance to Tom Adams, who played master spy Charles Vine in Second Best Secret Agent and Where the Bullets Fly. The music is loud, sharp and abrasive, like so many of the psychedelic thrillers of the period.
The movie appears to be the sequel to another film, with references to other capers engineered by our suave daredevil. As a matter of fact, it takes a while to actually understand how all the characters fit together; even the fact that Mister X is not a traditional hero. The opening credits support the idea that it was based on a comic book, much in the same style of the credits for Baba Yaga.
Seldom slow-moving, my only carp is that it takes a long time before we see our dashing leading man in costume, and that the story often gets more complex than I would have liked. The brutal dispatching of the lead criminal is inventive, and the coda is actually played in total black! (It doesn't seem to be a fault of the video transfer)
My source is an OOP copy from Wizard Video. I would be interested in hearing from other fans about this neglected genre of film making.