Physical description

Set of 4 black and white photographs of MMTB trialling overhead fittings for pantographs on the West Preston line.



.1 - dummy fitting of where two overhead trolley wires cross each other at 90 degrees

.2 - cross frog and signal contactor

.3 - Section insulators with pantograph pan depression bars

.4 - ears fitted to a curve section with a short dropping sections.



Handwritten note (filed with photos) giving photo numbers, location and that sent to ET. Not dated as such.



Electric Traction magazine issues for June and August 1977 - see image i5 an it advises of the pantograph trials and changes made. W2 546 had been fitted during May 1977 with a pantograph and a closed circuit camera.