Evershed's portable ohmmeter no.20818
Evershed's Ohmmeter no.2
1889
Evershed's portable Ohmeter no.399
Evershed's portable Ohmeter
direct reading insulation/resistance indicator
Fixed coil moving needle ohmmeter
1881
"Metrohm" moving coil ohmmeter for use with external battery
Ohmmeter made by Record of Broadheath. Used in the 1960s by James Alan Ridehalgh
1925-1935
Evershed ohmmeter
circa 1905
Direct reading ohmmeter no. 23008 by Everett
1903
Ohmmeter with calibration chart
circa 1892