Stereoscopic daguerreotype of a young man standing looking right with his right forearm resting on the back of a carved chair. He is wearing a coat, waistcoat with watch-chain, and a white shirt with bow-tie.

The sitter is likely to be Prince Frederick William of Prussia (later Frederick III, German Emperor, and husband of Victoria, Princess Royal, first daughter of Queen Victoria and Prince Albert). This daguerreotype is probably the one described as 'of Pr Fred. Will.m of Prussia 1852' in the List of Daguerreotypes belonging to Her Majesty (Royal Archives, Windsor, VIC/ADDC04/2). 

The two images are set beside each other in a slide, which is housed in a rectangular black leather case.
Stereoscopic daguerreotypes were developed to give the illusion of a three dimensional image. This was done by viewing two identical images side by side, which the brain then combines to give the illusion of depth.