Original Filmation character model sheet for Skeletor, used by the animation team to maintain consistency across the 130-episode Filmation run. The sheet defines the canonical skull-face proportions, the hood drape, and the Havoc Staff silhouette.
Catalogue source: heman.fandom.com (CC BY-SA 3.0) and Filmation production archive scans.
Image: Filmation studio model sheet, via characterdesignreferences.com.