The Contessa Deckrullo Nettel Stereo is an early 20th-century stereo plate camera fitted with a focal-plane shutter, made for producing paired images on glass plates for stereoscopic viewing. It was sold by Contessa-Nettel, the German manufacturer formed before its 1926 absorption into Zeiss Ikon, placing the camera in the pre-Zeiss-Ikon era of the firm's output.

Auction evidence for this model is extremely thin: a single UK saleroom hammer result of £229 is recorded, so any sense of what one sells for today rests on that lone data point rather than a true range. Because the figure is a wholesale auction price and the camera trades infrequently, condition, completeness of the original plate holders, and shutter function are likely to drive value well above or below that benchmark when a fresh example surfaces.