Footage of a Landy with trailer using a Miller Bridge.
You do have to go to the trouble of getting a login to access the old movitone footage, but it is a very good resource, although you may need to be imaginative in your search perameters. Fun way to spend a hot day in front of the A/C
http://www.movietone.com/N_index.cfm?region=4
Card Title: RIDING THE HIGH WIRE
Location: UK
Date: 18/05/1961
Length: 32 secs
Story Number: 82520