Leitz Elmar 9cm f4 film door The Kaiser Duplex Spirit level

The Kaiser Duplex Spirit level features a pair of 360-degree spirit levels for horizontal and vertical shooting

but it does the job

Attaches easily and provides a trigger-grip shutter release system that requires no additional cables

takes a picture

Leitz Elmar 9cm f4 film door The Kaiser Duplex Spirit levelThis Leitz Elmar 9cm f4 is a pre war lens, but just barely (the serial number makes this a 1938 model). Cosmetic condition isn't the nicest, with paint and finish wear but honestly it's not a bad look (that's real brass in there!). Optics have minor haze. Diaphragm moves well, focusing is a touch stiff. A nice compact lens that's surely seen some interesting things.