The story featured in this comic, Butterfly Man was written by the prolific Swede, Claes Reimerthi and the art is by Argentinian artist César Aurelio Spadari. Reimerthi of course also penned The Heart of Darkness. His Phantom writing career began with Fantomen in 1984 with Gold Fever, parts 1 & 2. This story was eventually reprinted by Frew in Issues 1583 and 1584. He subsequently went on to write approximately 250 Phantom stories not counting the epic 350 page, Heart of Darkness.
Bought this on the whim yesterday with no history of reading Phantom comics so this turned out to be an okay read from a subjective POV as it lacked a thorough storyline. The illustration is awesome throughout.