found: Pine Cone Brand [graphic], 1890-1900:image recto (Mutual Label & Lith. Co. S.F.)
found: Wilson, H. Results of Spirit-leveling ... 1901:page 28 (printed by the Mutual Label and Lithographic Company of San Francisco, Cal.)
found: Last, J. Color Explosion ... 2005:page 137 (Mutual Label & Lithographic Co. 1899-1906; company completely destroyed in the 1906 San Francisco earthquake and fire; Schmidt rebuilt and resumed the use of the Schmidt name, renaming Mutual the Schmidt Lithograph Company)
found: San Francisco City Directory, 1899, via ancestry.com 17 October 2013:page opposite 1278 (Mutual Label & Lithographic Co.; E. Shelley Morgan, North Western Manager, 301 Macleay Bldg Portland, Ore.; Los Angeles Office: 401-403 N. Main St.; Main office 17-31 Main Street, San Francisco; Successors to Schmidt Label & Litho Co, Dickman Jones Co, H.S. Crocker Co [Litho. Dep't.])