Amplifiers; Binoculars; Clothing for protection against chemicals and radiation; Condensers; Eyeglass cords; Eyeglass frames; Holders for electric coils; Magnifying glasses; Microscopes; Periscopes; Pince-nez chains; Prisms for optics purposes; Protective gloves for industrial use; Safety goggles; Scientific and technical apparatus, namely, optical mirrors; Spectroscopes; Sunglasses; Telescopes; Tube amplifiers