A new water feed was introduced in 1942 with the clack valves being fitted inside a case on top of the boiler in front of the dome, which became standard for builds after 1944. The NCB bought five 5700 locomotives between 1959 and 1965, with number 7754 still working in 1975. Last of class withdrawn: 1966. Preserved examples: 3650, 3738, 4612, 5764/L95, 5775/L89, 5786/L92, 7714, 7715/L99, 7752/L94, 7754, 7760/L90, 9600, 9629, 9642, 9681, 9682. Features of the 57XX & 8750 include.
Die cast Chassis and footplate for excellent adhesion and pulling power. Powerful 5 pole motor providing fine power control. Beautifully detailed body with correct body type variations applied where relevant with many separately added details. Partial representation of working inside motion and many other exquisite fine details including.
Four cabs for original 57XX, Later 57XX, 8750 Collett cab and London Transport cab. Removable roof, secured with magnets for ease of fitting engine crew. Working cab doors, where fitted. Ash pan with correct double brake rodding. Wheels conform to the new O Gauge standard, suitable for O Super Fine.DCC Ready with a 21 pin decoder socket.