Heeey, I'll be getting this! Yay! Spiffy!!
American edition from Pacific Comics Club published in 1986
This is the Italian comic book series that Mario Bava's film DANGER: DIABOLIK from 1968 was based upon. It was created in 1962 by the two sisters Angela and Luciana Giussani. I don't remember this being published in Denmark (otherwise one of the leading countries in the 70s and 80s to publish comic books and albums [or 'graphic novels' as you modern kids call them now]). There's an okay Wiki page about the series here.