Check Out These Helpful Guides. Marvel Comics Style Guides History. The Marvel Value Stamp And How It Might Have STUCK You! This awesome poster was the work of John Buscema and Joe Sinnott. It has nearly all of the most popular Super Heroes of the Marvel Universe, in 1975. Some were mailed and taken from the convention folded, but this was bought and stored rolled so no folds. It measures 20.5 x 27.75 Overall condition is in Very Good due to edge wear, tanning and age spots. However, it still displays great and is rare to find in this condition, or any condition. Check out my other auctions for more vintage Marvel Comics superhero collectibles. 1972 Stan Lee Carnegie Hall Poster. The item “1975 Marvel Comics Super Heroes Comic Convention Poster Buscema Art Marvelmania” is in sale since Saturday, October 14, 2017. This item is in the category “Collectibles\Comics\Posters”. The seller is “tellshiar” and is located in United States. This item can be shipped to United States.