CREATE TABLE table_79257 ("Railroad  ( quantity ) " TEXT, "Class" TEXT, "Road numbers" TEXT, "Builder" TEXT, "Build year" TEXT)

what is the road numbers when the build year is 1943, the railroad (quantity) is clinchfield railroad (12 new, 6 secondhand)?
SELECT "Road numbers" FROM table_79257 WHERE "Build year" = '1943' AND "Railroad (quantity)" = 'clinchfield railroad (12 new, 6 secondhand)'
SELECT "Road numbers" FROM "table_79257" WHERE "Build year" = '1943' AND "Railroad (quantity)" = 'clinchfield railroad (12 new, 6 secondhand)'