RayBan Vintage Polarized mens or womens 3198 New Sleek

Vintage, I bought them, I think in the '90s. I just found them deep in my closet. Oh the things I am finding...lol! These are brown tinted lenses and bronze-brown arms. Really nice with original case and cloth. Smaller frame. RB 3198 New Sleek. I just noticed a slight variation of color on the lense. Not sure if it was always there or if it is with age??? It does not obstruct the view.