Highly unusual issue in that most of the content is articles rather than stories. Publication date from comicslistdatabase.com.
Description of the contents of Captain 3-D #1
10 pages of art printed sideways, two to a comic page. Mostly in pencil. Unpublished art intended for Captain 3-D No. 2
Art recreation by Bill Black.
Recreation of Bullseye origin story in Bullseye #3.