The Thornton-Pickard Stereo-Puck is a British-made stereo camera produced by Thornton-Pickard Manufacturing Co., a firm long established in the English photographic trade. It was built to capture paired side-by-side images for stereoscopic viewing and was positioned at the budget end of the stereo market when new.

At recent UK auction, hammer prices for the Stereo-Puck have spanned roughly £12 to £100, with a median sale around £48 across the limited sample on record. Because the dataset is thin and stretches over several years, what one sells for today is strongly driven by cosmetic condition, completeness and whether the shutter still functions — clean, working examples pull toward the upper end of that range, while tired bodies change hands for very little.