The Nettel Kamerawerk Argus is a German-made detective or spy camera, built by Nettel Kamerawerk in the early twentieth century before the firm merged into Contessa-Nettel. Cameras of this style were designed to be discreet, often disguised or compact for covert use, and they appeal today primarily to specialist collectors of early concealed-camera designs.

Sales data for the Nettel Argus is extremely thin: a single recorded UK auction hammer result of £900 in December 2009 is the only reference point available, so any current value estimate carries significant uncertainty. With just one data point at saleroom level, the price an example sells for today depends heavily on completeness, cosmetic condition and provenance, and a fresh appearance could move the figure materially in either direction. As of 2026, treat that £900 hammer as a historic indicator rather than a reliable guide to what the camera is worth now.