The product is a vintage X-Factor comic book issue #19 from 1987, featuring the first full appearance of the Horsemen of Apocalypse. It is a key issue signed by Walt Simonson and Louise Simonson, with a CGC 8.5 grade. The comic is a variant cover, retailer exclusive, and part of the Marvel Universe, specifically the X-Men series. The story titled "The Horsemen of Apocalypse" features characters such as Magneto, Storm, Krypto, Wonder Woman, Mister Sinister, and more, in an action-packed superhero adventure set in the Copper Age era.

X-Factor #19 is a key issue primarily because it features the first team appearance of the Four Horsemen of Apocalypse.

• First Full Team Appearance: The issue formally introduces the line-up of Pestilence, Famine, War, and Death (though Death's true identity as a brainwashed, metal-winged Angel/Warren Worthington III is kept masked until issue #24).

• Major Story Arc Transition: This book serves as a crucial turning point in Louise Simonson's classic storyline, setting up the Fall of the Mutants crossover event.

• Iconic Simonson Work: It features a highly memorable, dynamic cover and interior art by legendary penciler Walt Simonson, which remains a defining image of the 1980s X-Men era.