Photograph - Display of Hecla Products for Advertising Purposes; circa 1920s; Black and white photograph of display of Hecla heaters and other domestic appliances including examples of the Hecla logo and an advertising poster with the slogan 'CLEAN / QUICK / ECONOMICAL' circa 1920s. The photograph has been touched up for printing purposes: the background is painted white and some extra details have been drawn in to the appliances in black ink. This photograph is from an