I got recently my first Leica M.... it's a very nice, just Cla'd M2.
She comes with 3 lenses. 2 M39 (Summitar 50mm f/2, recently tested
on another camera, waiting for the adapter ring and Elmar 90 f/4) and an M Mount Voigtlander Color Skopar 35mm f/2,5
To test the camera (worked fine), this time I used the Voigtlander and got all very nice images... helped for exposure by the Voigtlander VC meter.
You can check more on my Film Blog