Country of Origin: United Kingdom
Time Period: 1900-1940
Battle / War: World War I; World War II
Product Condition: Good
Product Dimensions (cm): 10 x 3 x 2.5
A smalll bore ventometer used to measure wind resistance and velocity. Features a graduated scale with clear markings, precision screw adjustment, and an engraved "Patent" marking on the body, indicating an original and innovative design. Made from high-quality brass and steel components for durability and precision.
