SR Southern 2 sheets Maunsell Locomotive Lettering & Numbering. Cap height of large yellow numbers is approx 6mm. Southern lettering approx 35.5mm wide 2.3mm high. This Southern offering provides the 1920s/1930s style of loco graphics. The large numbering sheet also includes yellow bufferbeam numbering with black drop shadows while the company branding is in the most commonly used size in yellow Egyptian expanded capitals.