Leica M Mount Elmar 9cm 4.5 Portrait Range finder lens M2, M3, M5, M6 M7.
It's fully functional no issues at all:
Glass es are clean no scratch no marks on the elements
No fungus no haze inside between the elements
Focusing is smooth
Aperture clicks fine on each stop
Body of the lens shows normal sign of use 
Comes with front cap and Bubble case.