9.25x18.25x2.25" deep box has nice lid graphics with Holmes using magnifying glass to see text "Secret Code Messages". c. 1946 made by Stuart Hall Co. Inc. Lid top lists contents: 24 Printed Sheets 24 Plain Sheets, 24 Quality Envelopes, 8 Page Instruction Booklet, Bottle Of Invisible Ink, Bottle Of Regular Ink. Die-cut insert holds booklet with code inside, bottle of "Sherlock Holmes Special Writing Ink", bottle of "Sherlock Holmes Mystery Invisible Ink", 14 envelopes, 20 plain sheets, and 29 printed sheets with four different designs including Holmes with magnifying glass and letter, carrying "Secret Message", young girl with magnifying glass looking at letter, and "Secret Message" sheet with no art. Lid has two corner splits with some dust soil and bit of wear around edges. Fine. Writing ink bottle has dried up contents, invisible ink bottle is still 1/3 full. Booklet has 1" moisture mark at lower right corner. Overall bottles VG/Fine, rest is Fine/Exc. Interesting set for the Holmes completist.