Replacement Focus Tab for the Leica 35mm pre-asph v2. Replaces the original plastic tab with a metal one. The convex tab is a bit deeper than the plastic one. Affixes to the lens with an M1.6 nut (not supplied) glued into the back of the focus tab. An M1.6x3mm screw then screws into the tab from inside the lens (the head of the screw may need to be filed down to fit).
See these threads here for details;
RFF;
LUF
Raw Silver option to get closer to matching the Titanium version of the lens.
Note, this tab also fits the 2/35 Summicron
v2/3 (see image in matte black steel), and the 40C.
To fit lenses with diameter equal to 49.8 mm