The Grand Comics Database credits this cover to veteran comics illustrator Jack Sparling.
red skies, I don't know why. I also love how his right pants leg - and artificial skin - is torn open to reveal his exposed bionics!
As with Space: 1999, Connecticut publisher Charlton put out both a regular color comics series and a B&W, magazine-sized series with different contents and interior art by the Continuity Studios crew (apparently, Sparling was part of Continuity at the time).
I don't have this particular issue, but I do still have a couple of them, beat-up and ragged, tucked away in a longbox somewhere. I know I have #2, with its gorgeous Neal Adams cover illo.
Hmmm... how does the Six Million Dollar Man stay in shape, anyway? Inquiring minds want to know....