The Foth Derby (I) is a small folding strut camera that takes 127 roll film, produced in Germany during the late 1920s and into the 1930s. It was positioned as a compact, pocketable amateur camera at a time when 127 format was popular for travel and snapshot photography.

With only a single recorded UK auction hammer result of £30 in early 2025, the Foth Derby (I) sells for modest sums at saleroom level today, and its current value sits firmly in the budget tier of pre-war folding cameras. Wholesale hammer prices exclude buyer's commission, and clean, working examples with intact bellows and shutters tend to attract more interest than incomplete bodies.