The product is a Tessar Carl Zeiss lens with an aperture of f/6.3 and a focal length of 13cm. The lens is marked with "DRP," which likely indicates that it is a vintage lens manufactured in Germany. The Tessar design is known for its sharpness and image quality, making it a desirable option for vintage photography enthusiasts.

Overall, this lens offers a unique combination of German craftsmanship and vintage design, making it a valuable piece for collectors or photographers looking to experiment with older lenses. Y