Plastic on the temple is cracking part of it has fallen off.  See pictures

This is an authentic vintage pair of American Optical Aviator sunglasses made in the USA during the 1970s. The sunglasses have a gold metal frame with brown glass lenses that provide UVA protection and anti-reflective technology. The aviator style is classic and timeless, and the sunglasses are water-resistant. The sunglasses are 5 1/2 inches in size and are designed for men.