Ventometer large bore anemometer (W.Gregory &Co) Edged Weapons These badges were issued to

These badges were issued to civilians engaged in essential war work during World War I to exempt them from military enlistment scrutiny

an infantry regiment of the British Army

Marked with "Patent No

The second pattern of the R4 bayonet

Ventometer large bore anemometer (W.Gregory &Co) Edged Weapons These badges were issued toThis Ventometer, engraved with the maker's mark "W. Gregory & Co, London," is a precision tool designed for measuring windage or airflow in large bore applications. The instrument features a fine scale and adjustable threading mechanism for precise readings. Its compact and robust design suggests military and field use in ballistic or environmental contexts. The tool remains in good condition, with visible engravings and functional components. Maker's