1980. Pete Sears flying his antique Stampe SV4C over Sonoma County. By Pete | July 18, 1980 Stampe SV4C. This is an air to air shot of me flying my beautiful antique Stampe SV4C open cockpit antique bi-plane over Sonoma County, California. N number. 111SV It was an amazing aerobatic aircraft…and flew like a dream.