This was one of Dennison's go-to designs, issued in a numbing number of iterations. In 1922, they issued a slide box of twelve of these broomed witch illuminated silhouettes using stock number H-641. In 1926 Dennison issued a closely related variant of gummed silhouettes in a slide box containing six. I suspect this listed set of six was made sometime during 1923 to 1925 based on the reduced number of units per package, the lack of a printed stock number and the monochromatic box. Even with the large form-factor, which typically commands a premium, this design typically doesn't fetch more than about $75.
04/02 Update: These sold for $76.26.