Ventometer large bore anemometer (with sight) Books used with the FN/R1 rifle

used with the FN/R1 rifle during the 1960s–1970s

The design features a sphinx with the word "EGYPT" inscribed beneath it

" indicating its patented design for precision airflow measurement

AG Parker model "TZ" Appacher peep sight for 303 long lee and SMLE

Ventometer large bore anemometer (with sight) Books used with the FN/R1 rifleThis Ventometer, labeled as a large bore anemometer, is an intricate and precise tool designed for measuring windage or airflow, particularly in large bore applications. Manufactured by W. J. Jeffery & Co., Gun & Rifle Makers, it features a detailed scale and adjustments for precise readings. The tool's build quality and design indicate use in firearms related settings, possibly for ballistic or environmental wind adjustments. It is in good condition