CREATE TABLE table_24616 ("Original number" TEXT, "UIC number" TEXT, "Name" TEXT, "Constructer" TEXT, "constructor number" FLOAT, "Year" FLOAT, "Withdrawn" TEXT, "Kilometers worked" FLOAT)

When 9/07/1999 is the date of withdrawn what is the original number?
SELECT "Original number" FROM table_24616 WHERE "Withdrawn" = '9/07/1999'
SELECT "Original number" FROM "table_24616" WHERE "Withdrawn" = '9/07/1999'