Teloc speed indicator and recorder No 3940 for locomotives, built by Hasler Telegraph Works, c.1930. Teloc Speed Indicator 1930
Speed Indicator and Recorder, Hasler-Hausshalter type, by G. Hasler, Berne, Switzerland, as fitted to North British Locomotive Co engines built for France during the 1914-1918 war. Hasler Speed Indicator and Recorder 1914-1918
Vertical speed indicator by DBA Division, Air Equipment, Asnieres, Hauts-de-Seine. Part no. 003-033 for Concorde Vertical Speed Indicator