Printing information: The 5th printing of the D&D box can be distinguished from the 4th printing by the printing
information inside the booklet — stating the booklets are 'COPYRIGHT 1974' (see picture to the right).
Also, the booklets don't show a cover price anymore.
Collector's Arcana: This is the 5th printing of the D&D box, the first item that spawned the legendary D&D game.
Box contents:
Outer box (see picture above).
"Men & Magic": booklet (see picture at the bottom, 21.5 cm x 14.0 cm).
"Monsters & Treasure": booklet (see picture at the bottom, 21.5 cm x 14.0 cm).
"The Underworld & Wilderness Adventures": booklet (see picture at the bottom, 21.5 cm x 14.0 cm).
Reference sheets (loose-leaf, see picture at the bottom).