SR Southern Maunsell Locomotive Lettering & Numbering. This Southern offering provides the 1920s/1930s style of loco graphics. Large numbering, yellow bufferbeam numbering with black drop shadows while the company branding is in the most commonly used size in yellow Egyptian expanded capitals. The Southern lettering is 17.75mm x 1.15mm, the large numbering is 3mm high and the yellow/black shaded numbers are 1.16mm and also 1mm high.