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Descripción archivística![Pretoria, 1974. Three SAR Class 6EI Srs 4's with lead engine No E1498 delivering a train of SAR C...](/uploads/r/null/f/2/7/f2750d3d41df32991f249f1b34a37bd31927ab2989c605b58420577641f5f0f7/CB_012_090_74_142.jpg)
Pretoria, 1974. Three SAR Class 6EI Srs 4's with lead engine No E1498 delivering a train of SAR Class 35-200 diesel locomotives from Durban Harbour to Capital Park passing Olifantsfontein.
![Pretoria. 3kV DC electrification, Rosslyn – De Wildt number 2 line, tests to measure contact wire...](/uploads/r/null/9/3/e/93ef5b792d47521629eea552f75d8343a1611955bff176d900f331c7385b6228/BF660_13_142.jpg)
Pretoria. 3kV DC electrification, Rosslyn – De Wildt number 2 line, tests to measure contact wire uplift. Six SAR Class 6E1's travelled in both directions with trailing pantographs at 50, 70 and 90 km/h on a test section between mast pole 33/9 and 33/10 with a temporary mast halfway between them All three mast poles were instrumented to measure contact wite uplift, technician setting up measuring equipment at mast pole 33/10. A linear potentiometer visible above the right hand of the technician measured contact wire uplift.