I am the first owner and did not use this Lens too much back in 1975. It is like new.

11228. 6 elements. Made in 1965. Rare early lot with red scale Summicron R 50/2 Lens --Mint--

Lens: The Summicron R 50/2-R LEITZ WETZLAR is optically perfect, there are no cleaning marks neither on the first or the last elements, it is clear and clean with no fungus nor scratches. 
The focusing and aperture rings are smooth and positive in operation. Serial Number is 2000973. This Lens had always the original filter on. 

Included: 
Series VI Filter and Retaining Ring (Leica code 14160U) 
Summicron 50/2 Snap-On Lens Hood (Leica code 12564) 
Original Hood Lens Front Cap, (Leica code 14163K)

NOTE:      It comes with NEW Adaptor for Fujifilm Digital Cameras: 
FX, X-T1, X-A1, X-E1, X-E2, X-M1, X-Pro1