10.5x11" envelope with cardboard insert has Cocomalt ads on back. Front has nice image of boy and girl playing with helmet and rocket pistol premiums enclosed as well as assembly instructions. Envelope was postally issued and as such, has creases from mailing and .25" tear on one corner. Fine. c. 1934. Comes with 5.5x9.5" cardboard pop gun with paper insert for producing "pop." Gun shows only the lightest traces of wear with some creases along top fold and on handle. Fine. 9.75x10.75" folded cardboard "Wilma Deering" helmet has scattered faint creasing at folds as issued, never assembled. Exc./N. Mint. Also included is 7x10" letter from Buck Rogers with a great sales pitch for Cocomalt and his image in logo at top. Lt. wear. VF. An extremely rare set, especially in this choice condition.