D Vr: Dynometer Tests for 2-8-0 steam locos. C2, C9, C18 & C19, presented as extremely long rolls of paper (65 cm wide, many metres long), recording various 150km return journeys Melbourne-Bendigo, to test loco. braking & coal burning efficiency. The rolls show a test made on 21/3/1935 along with other similarly dated tests. These one-off rolls record important tests! (6 rolls)