Included here are common (C), fairly common (F), and uncommon (U) occurances. Not included are rare, casual, and irregular sightings.
Santa Cruz County, California
... - Jackie Stewart[?], (United Kingdom) 1967 - Denny Hulme[?], (New Zealand) 1968 - Graham Hill, (United Kingdom) 1969 - Graham Hill, (United Kingdom) 1970 - ...