Beautifully designed cardboard box  with 12 colored pencils. Manufactured by an Austrian corporation founded in 1900, first named Mühlendorfer Kreide-, Kalk- und Steinindustrie AG. In 1934 it was renamed into Mühlendorfer Kreide- und Bleistiftfabrik AG. In 1939 the company was restructured into a sole proprietorship with Margit Hoffmann-Ostenhof as the sole proprietor.

Given the history of the company I assume that these pencils were produced between 1934 and 1939. Also the label refers to Mühlendorfer Kreide- und Bleistiftfabrik AG.