The Ica Ideal Stereo (6x13, 651) is a stereo plate camera producing paired 6x13 cm images, made by the German manufacturer Ica in the early twentieth century before the company was absorbed into Zeiss Ikon in 1926. It was positioned as a folding stereo instrument for advanced amateur and professional use.

Public auction data for this model is extremely thin: a single recorded UK saleroom result from 1998 saw an example sell for £109 at hammer. With only one historic data point, there is no meaningful current range or median to quote in 2026, and any present-day value would need to be established by fresh comparable sales rather than extrapolation from a decades-old auction figure.