The Deckrullo Stereo Nettel Tropen (Tropical) is an early 20th-century stereo plate camera made by Nettel Kamerawerk in Germany. The Tropen designation refers to the tropical specification — a teak-bodied variant with brass fittings intended for use in hot, humid climates — and the camera uses a focal-plane shutter to expose paired stereo negatives.

Sales evidence for this model is thin: a single UK auction hammer result of £800 in March 2018 is the only data point available, so a meaningful range or current median cannot be quoted with confidence today. As with most pre-war tropical wood-and-brass stereo cameras, value at saleroom level is highly condition-sensitive, with the integrity of the teak, leather bellows, and focal-plane shutter curtains being the main drivers of what one sells for.