This is the "4th printing" of Fantagor (1970) #1 - a self published Fanzine by Richard Corben. It's exact publishing date is unknown.
This 4th edition can be distinguished from the 2nd and 3rd printings by its price of 75˘, and the presence of the name tag "Richard V. Corben" on the bottom of page 1. See the indexed pages for the 2nd and 3rd printings for their distinguishing characteristics.
This edition features a new 4 page story, "Inna Pit". It's printed on newsprint - worse paper than the original edition, and has smaller dimensions as well at 7" x 10".