Ventometer large bore anemometer (W.Gregory &Co) Edged Weapons and topped by a crown

and topped by a crown to signify loyalty to the monarchy

The badge is made of bi-metal construction

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

The crown reflects loyalty to the monarchy

AGA Parker + 5 Bisley peep sight for 303 Long Lee and SMLE

Ventometer large bore anemometer (W.Gregory &Co) Edged Weapons and topped by a crownThis 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