The Showa Kogaku Gemflex (I) is a Japanese subminiature twin-lens reflex camera from the post-war era. It was a niche product aimed at enthusiasts of compact precision cameras rather than the mainstream rollfilm TLR market.

Sales data for the Gemflex (I) is extremely thin: a single recorded UK auction hammer result in 2002 reached £293, which gives only a historic reference point rather than a reliable guide to what one is worth today in 2026. Because subminiature TLRs trade infrequently at saleroom level, current value depends heavily on completeness, cosmetic condition and the presence of the original case, and a clean example would likely sell for a similar or higher figure when one surfaces.