CREATE TABLE table_31322 ("SAR No." FLOAT, "Builder" TEXT, "Year" FLOAT, "Works No." FLOAT, "Firebox" TEXT, "Driver Diameter" TEXT)

For what year is the SAR no. 874?
SELECT "Year" FROM table_31322 WHERE "SAR No." = '874'
SELECT "Year" FROM "table_31322" WHERE "SAR No." = '874'