This is the Flaman speed recorder now fitted to Mallard but it is not the original. The Flamans in all of the A4s were removed in WW2 as there weren’t the resources to keep using the recordings (they used a lot of paper and staff time to check them). This one was fitted by Doncaster works when Mallard was preserved and was sourced in France. The speed dial had to be made from scratch because the French one was in kilometres per hour.
Loco speedometers and track-destroying trains
