This issue has variants.
Background art taken from interior story. Perlin art confirmed in the letters page in Marvel Spotlight #30. Janson inks on Moon Knight figure. Info per Nick Caputo.
Last previous appearance of Moon Knight was in Werewolf by Night (Marvel, 1972 series) #33. A magical construct or clone of Moon Knight appeared in Werewolf by Night (Marvel, 1972 series) #37, but that wasn't strictly an appearance of the character.