The Stöckig Union 27 is a German-made plate camera dating from the early twentieth century. The "two shutters" designation refers to a configuration carrying two separate shutter mechanisms on the same body.

Sales data for the Union 27 is extremely thin: a single recorded UK auction hammer result of £300 in late 2023, which excludes buyer's premium and represents a wholesale saleroom level rather than a dealer price. With only one data point, today's value for a comparable example is best treated as a rough guide near that £300 figure, and condition, completeness of the shutters, and bellows integrity will swing what one actually sells for in either direction.