Electro-mechanical tachometer by Smiths
Dr T.H.Horns' patent tachometer
Component for the tachometer
1891
Schäffer & Budenberg tachometer
Tachometer for electronic Chernikeeff log, England, 1953-1963
1953-1963
tachometer
1950-59
Hand held tachometer
tachometer
1900-1913
Sir W H Bailey & Co. Ltd patent engine revolution indicator
circa 1900
tachometer
1950-59
6" Tachometer with cross-pendulum movement
1877-1921
Engine test bed tachometer in box
8" Horizontal Pattern Tachometer
Bluebird rev. counter
1962