The Rolleiflex 9x12 is a prototype large-format camera from Rollei, a German manufacturer better known for its medium-format twin-lens reflex models. As an experimental piece that did not reach series production, it sits outside the company's standard catalogue and is encountered only as a one-off collector item.

Pricing reference for this prototype is extremely thin: a single documented UK auction hammer result from 2013 reached £13,000, which establishes the only known wholesale saleroom benchmark rather than a true market range. Because prototypes trade so rarely, today's value depends almost entirely on provenance, documentation and the specific buyer in the room on the day, and a current price could deviate substantially from that 2013 figure.