Montblanc MB0338O Optical Frame is a squared acetate eyewear that combines a thin, easy-to-wear silhouette with a distinctive Nib detail on the temples. Designed for everyday prescription use, it balances classic lines with subtle brand detailing. Key attributes: Black | Acetate | Lightweight frame | Stable full-rim construction | Compatible with prescription lenses | Supplied with demo lenses (replaceable) | Comes with original case and accessories | Squared/rectangle shape | Nib detail on temples | Montblanc lettering logo on temples | Full-rim frame | Dimensions & fit: 52-18-145 | 54-18-145 | Thin, easy-to-wear silhouette | Composition & care: Acetate (frame) | Clean lenses with a microfiber cloth. Store in the protective case when not in use. Avoid exposure to high heat and harsh chemicals.