Note at the bottom of the splash page states: "Previously published 1966".
Artist identified from sample panels at https://www.lambiek.net/artists/l/lopez-espi_rafael.htm. The filename of the Lambiek image implies this story was originally created for Fleetway's Marilyn magazine in 1960. The panel that has the artist's signature on the Lambiek site is present in this issue, but the artist's signature has been removed (possibly as part of the modifications needed to convert the story from the original tabloid size to this digest size).