The Steinheil Casca I is a 35mm viewfinder camera produced in Germany in the late 1940s. It was Steinheil München's entry into the postwar 35mm camera market and is encountered today primarily as a collector item rather than a user camera.

Sales data for the Casca I is extremely thin: a single recorded UK auction hammer result from November 1998 saw an example sell for £460. With only one data point at saleroom level (wholesale, before commissions), there is no reliable median or range to quote for what a Casca I is worth in 2026, and present-day value would need to be inferred from comparable postwar German rangefinder and viewfinder cameras rather than from this model's own price history.