R40101 Maunsell Open Third BR S1338SSouthern Railway inherited a variety of coach stock that had been used by other railway companies pre grouping. Furthermore, Southern Railway continued to build new coaches to the design of the three largest companies. The Maunsell carriage was intended to be the standard carriage design for use across the Southern Railway lines, incorporating the best features of each of the former companies' designs. Maunsell Coaches were constructed between 1925