Heritage is about to auction an 8-inch Spider-Man figure from Mego's "World's Greatest Super Heroes" line, released in 1978. The special feature of this auction item lies in its packaging cardback: it features multiple Marvel characters, with the Hulk depicted in his 1978 design. Currently, only three graded copies of this same version exist.
Marvel adjusted the Hulk's appearance in the mid-to-late 1970s, and Mego used different images on its packaging cardbacks in 1975, 1978, and 1979. The cardback for this auction item uses the 1978 version, featuring the Hulk in purple pants in a crouching pose; this design was in circulation for approximately one year.
"Three pieces" refers to the specific cardback version of this graded item, not the total number of existing Spider-Man figures. This auction item itself received an AFA 80+ grade, and its year, Hulk design, and grading record together form the basis for identifying this version.