This Ventometer is engraved with "Parker's Combination," indicating its patented design for precision airflow measurement. Designed for use in large bore applications, the tool features fine scaling and robust adjustment mechanisms for precise readings. Manufactured with a sturdy design, it is highly suitable for ballistic, industrial, or environmental applications. The tool remains in good condition, with legible engravings and minimal wear. For Martini Henri in 303 and 360 Rook.
