Says "Second Printing January 1972" at the bottom of page 2.
The glasses and perforated tab are blank, except for the “Deep 3D Comix” logo printed on it. They are stapled directly to the inside front cover.
The colors on the pages are really faded.
SRUCC: Deep 3D Comix #1, 1st Edition
SRUCC: Deep 3D Comix #1, 3rd Edition
Comixjoint: Deep 3D Comix, 2nd printing
Grand Comics Database: Deep 3D Comix #1, 2nd printing