CREATE TABLE table_39909 ("Number" FLOAT, "Builder" CLOB, "Type" CLOB, "Date" CLOB, "Works number" CLOB)

Which Builder has a Date of early 1871?
SELECT "Builder" FROM table_39909 WHERE "Date" = 'early 1871'
SELECT "Builder" FROM "table_39909" WHERE "Date" = 'early 1871'