The Concava Tessina Dummy is a non-functional display version of the Tessina, a Swiss-made subminiature 35mm camera. Dummies of this type were typically produced for retail display or sales-training purposes rather than for taking photographs.

Sales data for the Tessina Dummy is extremely thin: a single UK auction hammer result from 2008 sells for £220, and that figure remains the only documented reference point for what one is worth today. With just one wholesale saleroom price on record, the current market value in 2026 is best treated as indicative rather than established, and condition, completeness and presentation case all materially affect the price achieved.