Illustrated envelope contains 3x5" die-cut cardboard "Captain Marvel Magic Whistle." Front of envelope features Captain Marvel's alter-ego Billy Batson blowing the whistle while reverse shows generic premiums that were earned by selling seed products. Front/back of whistle feature same color image of Captain Marvel flying w/"Shazam" lightning bolt design. Whistle has mouthpiece on one end w/instructions also printed on the inside. 1940s. ©Fawcett Publications Inc./The Advertisers Service Division Inc. Both whistle and envelope are NM. 4.25x7.25" colorful display card w/die-cut design contains 4.5" long "Captain Marvel Magic Flute" by Lee-Tex Rubber Products Corp. ©1946 Fawcett Publications, Inc. Card features illustration of flying Captain Marvel holding flute as if he is carrying it. Die-cut arm designed to help hold flute in place has been neatly reattached. Card has lt. edge/corner tip wear and is missing tab designed to secure front of flute. VG/Fine. Flute has cardboard tube w/color paper label and hard plastic mouthpiece. Flute features "Captain Marvel" comic book title logo and Captain Marvel image. Flute works and produces a loud musical note. Exc./NM. From the Robert M. Overstreet Collection and comes with COA.