The Tokyo Kogaku Primo Junior is a Japanese-made twin-lens reflex camera using 4x4cm 127 roll film, produced in the late 1950s as a compact alternative to full-size 6x6 TLRs of the period. It was positioned as an entry-level reflex aimed at amateur photographers seeking a smaller, lighter rollfilm camera.

UK auction evidence for the Primo Junior is thin: the only recorded hammer result we have today is £75 from March 2022, which gives a single data point rather than a reliable range. Because these are wholesale saleroom results rather than retail asking prices, dealer-listed examples typically sell for more, and condition of the taking lens, shutter and focusing screen will swing the value materially.