CREATE TABLE table_204_30 (id DECIMAL, "year built" TEXT, "works number" DECIMAL, "wheel arr." TEXT, "gauge" TEXT, "original owner" TEXT, "name" TEXT, "current location" TEXT, "notes" TEXT)

what is the works number of the only item built in 1882 ?
SELECT "works number" FROM table_204_30 WHERE "year built" = 1882
SELECT "works number" FROM "table_204_30" WHERE "year built" = 1882