Indicia states that Number 61 was copyright 1949, reissued 1968. Exists in an edition with binder promo on inside front cover, Classics Illustrated Junior promo with HRN 576 on inside back cover, and Classics Illustrated promo with HRN 166 on back cover.
This issue is a variant of
Classics Illustrated (Gilberton, 1947 series) #61 [O] - The Woman in White.
There exist further variants: