Hard to find genuine Leica UVa filter A36 size (36mm, to fit the early screw mount lenses such as the Summaron or Elmar 3.5cm.
In good and clean condition for its age.
Some cleaning marks on glass.
 
This filter size fits the following Leica/Leitz early screw mount LTM lenses:
LTM Summaron 1:2.8 f=2.8cm
LTM Summar 1:2 f=5cm
LTM Standard Collapsible Elmar 1:3.5 f=5cm
 LTM Wide-Angle Elmar 1:3.5 f=3,5cm
 LTM Telephoto Elmar 1:4.5 f=13.5cm
 LTM Telephoto Elmar 1:4 f=9cm
 LTM Hektor Standard Collapsible 1:2.5 f=5cm & Telephoto 1:4.5 f=13.5cm