LENSES PRISMS MIRRORS AND OTHER OPTICAL ELEMENTS OF ANY MATERIAL UNMOUNTED (EXCL. SUCH ELEMENTS OF GLASS NOT OPTICALLY WORKED CONTACT LENSES AND SPECTACLE LENSES)
LENSES PRISMS MIRRORS AND OTHER OPTICAL ELEMENTS OF ANY MATERIAL UNMOUNTED (EXCL. SUCH ELEMENTS OF GLASS NOT OPTICALLY WORKED CONTACT LENSES AND SPECTACLE LENSES)