The Contessa Steroco is a stereo camera, designed to expose paired images on film for stereoscopic viewing. It sits within the early-to-mid 20th century tradition of European stereo photography.

Sales data is extremely thin: a single UK auction hammer result from 2003 saw a Steroco sell for £208, and with no further records the current worth in 2026 cannot be reliably stated. Buyers asking what a Contessa Steroco sells for today should treat that lone figure as a historic data point rather than a current market price, and condition, completeness of the stereo viewer or case, and originality will heavily influence value.