Danchuk lenses are made at our Manufacturing Facility in Santa Ana, California from the finest acrylic plastics available. The lens molds are made from 100% USA steel in the United States. A Danchuk USA Quality lens includes the “GUIDE” markings making them indistinguishable from the originals. We might even say that they are better, as the material we make them from is far superior to what was available to GM in 1955-1956 or 1957.