Original 1977 architectural trade magazine vintage ad for the KOHLER COMPANY. Main office and factory is located in Kohler, Wisconsin. Kohler puts gemstones in the most unexpected places. Presenting Alterna Onyx. For centuries, the worl has recognised the beauty of onyx. In delicate cameos. In beautiful sculptures. Now you can the elegance of this semi-precious gemstone into your home in a rather unusual way. Kohler has added onyx inserts to its line of Alterna faucets. ​This old one page architect interior designer plumbing advertisement would display beautifully matted and framed.