The Nettar series by Zeiss Ikon was a successful range of self-erecting folding cameras for 120 roll film. Zeiss Ikon always advertised the Nettar series as being for the amateur photographer. Nevertheless these cameras share many parts with the much more expensive Ikonta series (e.g. body and struts). The Nettar series may lack the higher specified lens/shutter combinations and things like film type and speed memo discs but the observed built quality is on a par with that of the Ikontas.

This example is a Nettar IIb 518/16 fitted with a 75mm Novar Anastigmat in a Pronto shutter. It dates from 1949.

For more information see here:

https://camerapedia.fandom.com/wiki/Zeiss_Ikon_Nettar

http://camera-wiki.org/wiki/Nettar