SCHEMA:
CREATE TABLE table_name_74 (points VARCHAR, year VARCHAR, entrant VARCHAR, chassis VARCHAR)
USER:
What is the number of points for the Entrant of wolfgang seidel and a Cooper t45 chassis later than 1960?

QUERY:
SELECT COUNT(points) FROM table_name_74 WHERE entrant = "wolfgang seidel" AND chassis = "cooper t45" AND year > 1960