Here is an older pair of nose bridge style eyeglasses - they have no arms or frame and sit on the nose bridge.  There is a small hole in one lens for a chain.  The lenses are clear and show some dirt especially on one near the edge.   The nose bridge shows N.E.O. Co.  The hard case is labeled Harris & Hoghead, Chattanooga, Tenn.  The case may not be original to the glasses.   There is wear on the case at the spine.     Please see pictures and ask any questions.  

Thank you for looking.  (Inv 25,999(d))