Modelmaster Decals - S.R. 1923-1947 Comprehensive sheet of white S.R. wagon lettering and numbering. S.R. 1923-1947 Comprehensive sheet of white S.R. wagon lettering and numbering. Uniquely, the wagon numbers are made up into ready made sets for instant application to your models, but there are also spare digits 0-9 to allow for variations on the available number sets and also to make up your own numbers if required. There are plenty of both the 1923 16" SR lettering and the post 1935 4" varieties on the sheet.