The Thornton-Pickard Imperial Stereo is a British-made stereoscopic plate camera, designed to expose paired images for stereo viewing. It sits within the early-twentieth-century output of Thornton-Pickard, a Manchester-area maker known for wood-and-brass field and stereo cameras of the period.

Auction evidence for the Imperial Stereo is thin: the single recorded UK saleroom result shows a hammer price of £576 in 2018, which gives a reference point rather than a true market range. Because that figure is a wholesale auction result and the sample size is one, what an Imperial Stereo is worth today depends heavily on completeness, condition of the bellows and woodwork, and whether the original lenses and plate holders are present.