Halo Had a contract with the U.S. Government to manufacture this model for soldiers during the 1960s era (vietnam) . Along with U.S.S and Bausch n Lomb this model frame was created all through the 1960s by those three manufactures.  This frame has never seen wear or use. It comes along with 46mm glass lenses that are in mint condition and have NO POWER..They have never been installed in the frame. They come with the original envelope from the manufacturer.  No cracks scratches or marks on the frame.  This is a piece of u.s. history from 1060s era so anything on the frame is due to that. Refer to photos. Size 46[]22, 145mm temple length. Frame measures 5" wide and 42mm vertically. Made in the USA.