Proton magnetometer consisting of a sensing element and a dummy meter case, by Littlemore Sci. Eng. Co., c.1970. (see part records) Proton magnetometer consisting of a sensing element and a dummy meter case 1970
Thalen-Tiberg magnetometer, 1880 type, with Dahlblom sine arm, 1928, by Berg Thalen-Tiberg magnetometer, 1880 type, with Dahlblom sine arm, 1928, by Berg 1928
Thomson-Thalen magnetometer, c.1899, by Berg Thomson-Thalen magnetometer, with box and display stand 1899
Vibration magnetometer by Griffin and George Ltd., with magnet and various metal bars Vibration magnetometer by Griffin and George Ltd. 1943-1983