CREATE TABLE table_63993 ("Class" CLOB, "Wheel arrangement" CLOB, "Fleet number ( s ) " CLOB, "Manufacturer" CLOB, "Serial numbers" CLOB, "Year made" CLOB, "Quantity made" CLOB, "Quantity preserved" CLOB, "Year ( s )  retired" CLOB)

What is the serial number of the model made in 1930?
SELECT "Serial numbers" FROM table_63993 WHERE "Year made" = '1930'
SELECT "Serial numbers" FROM "table_63993" WHERE "Year made" = '1930'