These are American Opticals patented " Fulvue" frame due to the high set temple hinges and ultimately the frame that also led to American Opticals downfall after loosing the patent on "fulvue" style frames by accepting a military contract from the united states government.  A classic piece of history or style and fashion for anybody looking for that vintage Ao 1950s 60s look. Made in the USA. ,25mm adjustable nosebridge, 140-145mm temple length.  Frame measures 127mm wide. 52mm lens width. Ready for your lenses to be installed for years of Ao classic style and fashion. There are NO cracks in rubber temples. They are in NO WAY brittle or breaking as shown in pictures.