6646 N.O.W. Titanium Eyeglasses by Lindberg. Color: C01, C02, C04, C06, C06G, C07, C08, C10, C11, C12, C14, C19, C20, C21, Size: 54-18-150. The 6646 rounds out the lineup with pill-shaped lenses designed to soften facial features. Titanium lines are unobtrusive, yet the constructed shape makes an impact. Flex hinges ensure ease and adaptability with movement. It’s a frame that embodies balance: calm, comfortable, and quietly refined.