This striking device is a Telyt 400 telephoto lens designed to be used with Leica M cameras. The lens is in great working condition and has been completely revised and fine-tuned so we can guarantee that it works like the first day of use. All its component parts and pieces are original and can be fluidly moved. The item is made of black-enameled anodized aluminum with chromed areas and plastic components. The lenses are clean and in optimal condition.At the front of this article we can see the manufacturers name, Ernst Leitz Wetzlar, printed in white lettering. We can also read the articles serial number: 1876213. Enrst Leitz Wetlzar is the name of the company that manufactured the famous Leica cameras and their accessories, just like this lens. In fact, Leica is an abbreviation of Leitz Camera. Together with Karl Zeiss Jenna, Ernst Leitz Wetlzar was the most powerful optical and photographic material manufacturer in the first half of the 20th century. Leica cameras and their accessories are still highly coveted pieces due to their unmistakable quality.This model was produced between 1956 and 1966. Walter Mandell was responsible for the design. Telyt 40cm lenses were redesigned in 1956 in order to reduce their weight and improve their performance. With the arrival of the Leicaflex the production was discontinued. 3360 unites were made under this particular design.We are looking at a high-quality telephoto lens, original from the 1950s and in perfect working order. This device will improve the performance of a Leica M and is also a wonderful collectors piece.