This is a vintage old school NOS Ford windshield wiper switch which is correct for all 1965 Mustang models equipped with the 2 speed wipers and1966 Mustang models with the 2 speed wipers which were built before 12/19/65.  If you need the late 66 style of switch, just see my other listings and you will find a NOS switch listed.  It is correct in every detail and will fit and work exactly as Ford intended. No import repro crap here!