©1937 John F. Dille Co. Extremely rare smallest set of 3 that were available. All are shown in “The Official Price Guide To Pop Culture Memorabilia By Ted Hake.” Box is 8x12-1/8x1.25” deep with choice lid graphics of Buck and Wilma watching Dr. Huer perform experiment in laboratory. Die-cut illustrated insert has nice graphics of Buck, Wilma, Dr. Huer and kids in laboratory with rocket ship at upper left. Lid has trace of lt. dust soil with a few small surface dents and side seam splits repaired on inside with cellophane tape. Left side panel has split. VG. Insert is lightly but evenly tanned. VF. Complete contents include set of 4 wood canisters with image of Buck on front. Chemicals include "Aluminum Sulfate, Tonic Acid, Sodium Carbonate and Ferric Ammonium". Also has 2 glass tubes, 1 with "Sodium Silicate", the other with "Phenolphthalein". Has aluminum spoon and aluminum stirring rod in place along with loose glass test tube. Lower left has paper packet of "Sodium Thiosulphate" and lower right has packet of "Blue Litmus". Comes with 4x6” paper instruction folder with 8 pages. Instruction sheet folder has lt. wrinkling from moisture. Fine. Loose chemical tubes show lt. aging, o/w contents are VF/Exc. Quite elaborate with wonderful graphics.