Classic Moustache Portrait Restoration

Restore and enhance this old black-and-white portrait without changing the person's identity. Preserve the original face exactly, including the eyes, nose, mouth, jawline, forehead, ears, hairstyle, skin tone, facial expression, age, and facial structure. Add a natural, neatly groomed medium-thickness black moustache that matches the person's age and facial proportions. Do not alter any other facial features. Remove scratches, stains, fading, dust, blur, noise, and discoloration while recovering fine details. Colorize the image with realistic natural skin tones and authentic clothing colors. Reconstruct missing details faithfully without inventing new features. Transform the photo into a modern professional DSLR portrait as if captured today using a full-frame camera with an 85mm prime lens at f/1.8. Use soft studio-quality lighting with balanced key light, fill light, and subtle rim light for a natural three-dimensional look. Improve sharpness, dynamic range, contrast, white balance, and color grading while keeping the background simple and realistic. Produce an ultra-realistic, high-resolution 8K image with crisp details, natural textures, and a premium professional photographer finish.