Modelmaster SR301 SR Wagon Lettering & Numbering 1923 - 1947 OO Gauge Waterslide Transfers 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.