CREATE TABLE table_1876825_7 (no_in_series VARCHAR2, production_code VARCHAR2)

Name the number of number in series for production code of 06-04-621
SELECT COUNT(no_in_series) FROM table_1876825_7 WHERE production_code = "06-04-621"
SELECT COUNT("no_in_series") FROM "table_1876825_7" WHERE "06-04-621" = "production_code"