Vintage Christian Dior' "monsieur" - Sunglasses tortoiseshell frames

Christian Dior CD logo tortoiseshell sunglasses vintage from Japan i15354. I purchased these but unfortunately the length of the ear stems was a little short for my head. Did not quite reach far enough back and go over my ears. Too bad for me as I really think these are very sharp looking, and I love side lens design. I believe they are from the 1970's, and are authentic ( I can't confirm, but my opinion is they are the real deal ) They carry the "Monsieur" Dior branding, which was established in that decade. Originally made in Germany and sold in Japan. These are a rare Dior design and I've not seen any like it.Though made for the Dior Men's market - I'd say these are Unisex. Product description: As this is a vintage item, there are small scratches, scuffs, and such, but it is in relatively good condition and can still be used perfectly. It seems that one of the stems has what may be a small hairline crack or just a scratch ..right where it would bend over the ear; Though it's hard to tell and even see it. The stem doesn't seem weakened or anything at that area. I tried to picture it, but tough to capture what may be a scratch. The stems are re-enforced with an internal wire so that's good. I would still be careful with them as a general rule, as they are old, and thus naturally a little more fragile. Brand: Christian Dior SIZE: cm (W x H x D) See image COLOR: tortoiseshell frames, brown/amber lenses.