Montblanc Optical Frame in a bold square silhouette. Crafted in Havana acetate, it pairs classic tortoiseshell styling with everyday prescription or non-prescription wear. Key attributes: Brown | Havana | Acetate | Full rim | Square shape | Havana tortoiseshell pattern | Subtle gold accents | Dimensions & fit: Lens width: 51 mm | Bridge width: 19 mm | Temple length: 145 mm | Composition & care: Acetate | Clean lenses with warm water and a soft, lint-free cloth; avoid household cleaning products and textured fabrics. Store in the case when not in use and handle frames by the bridge to avoid bending. Use a small screwdriver for minor adjustments.