Iron Man 1968 #111 - back issue

Obsessed with gold, Gudrun steals and hoards Asgardian gold. Thor and Sif use the "golden goodness" of Hostess Twinkies to entrap him.

Some copies had the four page Mark Jewelers insert. On-sale date from Comic Reader (Street Enterprises, 1973 series) #154 (March 1978).