This is an exceptional comic book for collectors and enthusiasts. Showcase # 78 features the first appearance of Jonny Double and is a Silver Age (1956-69) US Comics tradition. The comic book is certified and has been classified as fine quality.

The comic book is a part of the Comics & Graphic Novels category and falls under the Collectibles and Comic Books & Memorabilia subcategories. The Jack Sparling art is a notable feature that adds aesthetic appeal to the comic book.