Voigtländer Avus.

The Voigtländer Avus was introduced in 1914. They had a leather-covered aluminum body and a U-style lens standard with rise and shift for parallax correction. This later model (c.1930) has the brilliant finder centered over the lens, and uses an f/4.5 13.5cm Skopar lens (1 - 1/200) in a Compur shutter.