Question: Name the builder numbers with RR class of A1 and year less than 1916
SQL: SELECT "Builder Nos." FROM "2-12898181-1" WHERE "RR class" = 'A1' AND "Year" < 1916.0;

Question: Name the RR numbers of Hudswell Clarke and years before 1914
SQL: SELECT "RR Nos." FROM "2-12898181-1" WHERE "Builder" = 'Hudswell Clarke' AND "Year" < 1914.0;