Harold Gretzner (1902-1977) Born: Baltimore, MD; Studied: California College of Arts and Crafts (Oakland); Member: American Watercolor Society, California Water Color Society, West Coast Watercolor Society, Society of Western Artists. Harold Gretzner grew up in the eastern United States and attended art school in Washington, D.C. before moving to California in the 1920s. After settling in the Bay Area, he studied fine art in Oakland and lithography in San Francisco.