The sculptor and artisan Carl Elmberg (1889–1955) worked after his studies in Germany and Italy with the sculptor Carl Milles before he started working independently. Elmberg's works include portrait busts, reliefs and public decorations. For Nävfeqvarn's mill, he designed a number of cast iron objects, such as urns and jars. Together with the architect Marin Westerberg, Elmberg designed the Diana lantern in the mid-1920s, as the picture illustrates.
Cast iron is a living material and each product is unique. Properly maintained, a cast iron product can last for generations. The patina the cast iron gets over time is part of the product's unique value. Näfveqvarn's products are finished with alcohol-based paint to withstand moisture and water. How long the paint protects depends, among other things, on the weather and wind. If you want to give a new shine to the products, you can brush them with a wire brush and paint a new coat of paint.