Voigtlander VSL Series
All the VSL cameras are SLR.
VSL 1 and VSL 2 have a cloth focal plane shutter,
VSL 3 has a metal focal plane shutter.
VSL 1 has a CdS meter, VSL 2 and VSL 3 have a silicon one.
M42 mount lenses for VSL 1, bayonet mount lenses for VSL 1, VSL 2 and VSL 3.
These lenses fit also Rolleiflex SL 35 cameras (Voigtländer was bought by Rollei in 1972).