The Thornton-Pickard Duplex Ruby Reflex 'Overseas' (Tropical) is an early-20th-century British single-lens reflex plate camera, built in a tropical specification intended for use in hot and humid climates. It sits among the scarcer large-format reflex cameras from the Altrincham-based maker and is of interest primarily to collectors of British wood-and-brass photographic equipment.

Only two hammer results sit behind this listing, so the price picture is indicative rather than settled: the camera has fetched between roughly £900 and £1,800 at UK auction, with a midpoint around £1,400. These are saleroom wholesale levels rather than dealer retail, and in today's 2026 market condition of the wood, bellows and brassware is the main driver of where an individual Duplex Ruby Reflex 'Overseas' sells for within that band.