Montblanc MB0243O Optical Frame combines a clubmaster silhouette with Meisterstück-inspired temple detailing for refined everyday wear. Designed to accept prescription lenses, it pairs acetate durability with signature Montblanc accents. Key attributes: Black | Transparent | Acetate | Prescription-ready | Compatible with prescription lenses | Supplied with branded case and cleaning cloth | Clubmaster shape | Full rim | Meisterstück-inspired temple detailing | Snowcap emblem on temples | Dimensions & fit: Available sizes: 52 mm, 54 mm | Lens width: 54 mm | Bridge: 21 mm | Temple: 145 mm | Lens height: 41 mm | Composition & care: Acetate | Clean lenses with the included microfiber cloth; avoid abrasive cleaners and solvents; store in the supplied case when not in use.