Vintage American Optical Flex Fit Safety Glasses Frame. 1970s era. Perfect condition ,no cracks scratches or marks on frame. Refer to pictures.Hinges and screws perfect and tight. Lenses used as templates only and contain power but included with frame.Size 20[]50. 5 and 1/2 inch temple length. Very rare frame. Beautiful condition. Frame measures 5 1/2″ wide