Leica Summicron-M 5cm f2 Lens just CLA'd by Youxin Ye in July 2024.  His report follows:

Note:  CLA’d.  Cleaned and lubricated both aperture and focus rings.  Cleaned each element and removed haze inside.  Touched up missing paint.  The lens is clean and clear now considering its age, except for the last element outer surface has some fungus etch signs, beyond cleaning.  The lens is still a good user.  Tested the lens with digital M body, the lens is in focus and produces good images.

This lens was manufactured in 1957 in Germany

 

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