Tele-Elmar 135mm f4. The Leitz product code is 11851. The serial number is in the 2.2 million range, manufactured in 1966. This example is a late version with yellow feet distance markings, the so-called yellow scale.
At 135mm, it is the longest focal length rangefinder-coupled lens for the Leica M system. The minimum focusing distance is 1.5 meters, and the filter size is E39.

This item was previously sold by our shop and has now returned to us after being carefully used by the customer. There are only very slight rub marks on the helicoid ring, and the lens remains clean with minimal signs of use, unchanged from its condition at the time of the previous sale.
All functions are operating properly. Rangefinder coupling is spot on from the minimum focusing distance to infinity at full aperture.
There is a very small amount of internal dust, but no haze or cleaning marks are present. The glass is clear and transparent, and the results of the shooting test were excellent.
The matching-number original box, an all-black 12575 hood, a genuine 14033 hood cap, and a plastic case are included.