The Williamson Machine Gun Aerial Camera is a specialist British military camera designed for aerial gunnery training, recording what a gunner would have hit had a real weapon been fired. It was produced by Williamson Manufacturing, a London-based maker of aerial photographic equipment that supplied the British military through the mid-20th century.

Sales data for the Williamson Machine Gun Aerial Camera is extremely thin, with only a single UK auction hammer result on file: £1,198 in 2004. With no recent comparables, today's value is difficult to pin down at saleroom level, and what one of these is worth in 2026 will depend heavily on completeness, condition, and whether original mounting hardware and documentation are present.