Actually, if you want to read Windsor-Smith's "Red Nails" adaptation, this edition, ROBERT E. HOWARD'S CONAN THE BARBARIAN #1 (and only) is a far nicer reprinting of it in 1983.
The previous 1975 treasury edition for some reason shaves off part of the bottom of every page, presumably to make it fit the page-size dimensions of the treasury edition format.

Dark Horse has also more recently reprinted these issues in trade and hardcover, but with awful re-coloring.

I also love this title page from the story:



In a time when comics were aspiring toward a standard of book illustration and fine art. As opposed to the fanboy wankery that comics have descended into.