Victoria. Two Huge Safeworking, diameter grams. 1) 1968 Dudley Street Safeworking Diagram superimposed in red on standard black on white diagram and showing all signals (numbered) and signal boxes as well as sidings etc, framed and mounted, 81 x 191 cm. 2) 'Melbourne Yard Rearrangement Stage 17, Construction of 'D' Baloon & Connection to south side and No. 5 Shed', 1966, mounted on board, 93 x 267 cm. Faults. (2)