This issue has variants.
in Robert E. Howard's Conan the Barbarian (Marvel, 1983 series) #1 (1983)
in Conan Saga (Marvel, 1987 series) #75 (June 1993)
in Essential Conan (Marvel, 2000 series) #1 (July 2000)
in The Barry Windsor-Smith Conan Archives (Dark Horse, 2010 series) #2 (May 2010)coloring credits acknowledged by Barry Windsor-Smith in Spectrum Super Special #3 [2005]
in Conan Saga (Marvel, 1987 series) #7 (November 1987)
in Conan (Bladkompaniet, 1990 series) #8/1991 ([august] 1991)
in Essential Conan (Marvel, 2000 series) #1 (July 2000) [Confirm: direction of reprint]
in The Chronicles of Conan (Dark Horse, 2003 series) #3 - The Monster of the Monoliths and Other Stories (2003)
in The Barry Windsor-Smith Conan Archives (Dark Horse, 2010 series) #2 (May 2010)Inspired by Robert E Howard story 'The Black Stone'. Smith credit changed from sketches to layout, based on splash page credits and info derived from letters pages.
According to the interview of Craig Russell in Conan: The Jewels of Gwahlur, only the first page and a couple of separate panels were fully drawn by Barry Smith, Val Mayerik completed figure work and Russell backgrounds. Inker Dan Adkins fell behind and called on them to do finished inks.