Nettar Rollfilm camaras
From 1934 till 1959 the Nettar name was part of the Zeiss Ikon heritage. The Nettar cameras formed the low end of the rollfilm cameras.
Large numbers were produced with several film formats.
In fact, a Nettar with the addition of a selenium-based light meter.
The Signal Nettar sports a red flag in the viewer signalling the current frame is already exposed. Transporting the film cleared this red flag.