Original 70th Montana jeans dress, size M

Very nice vintage jeans dress from 70s. My mom bought it in Germany when she was a student and visited her friend there. This dress was hardly used but still has a good potential and needs some love (several last photos). This is size M, but it may be a little bit tight because it's cotton 100%. All buttons are original and labeled "Montana". Cool wear in effect. Feel free to ask questions about this dress