Leica 40 F2.8 Elmarit-C (M mount)- Produced in 1973 with a very compact design for use with the Leica CL. Comes in a bayonet mount only, rangefinder manual focus. The production numbers on this lens were at approximately 400 and were never officially sold to the general public. Has a rarity classification of R9 (on a scale of 1-10, R9= "Almost Unique" with R10 being "The Impossible"). BGN grade, $1,950. Find it here.