signed lower right in red ink numbered 17/20, 18/20, 19/20 lower center in graphite titled lower left in graphite California Computer Products company information printed along the bottom edge of the paper date unknown: circa 1960’s – 1970’s

signed and numbered 16/250 lower right in blue ink titled lower left in graphite date unknown: circa 1960’s – 1970’s

signed lower right in ink titled upper left corner in graphite titled upper left corner on the reverse in graphite datę unknown: circa 1960’s – 1970’s

in visible inscriptions datę unknown: circa 1960’s – 1970’s

signed lower left in ink titled on the reverse in graphite

signed lower right in red ink titled and numbered 1/1 lower left in graphite titled upper right corner on the reverse in graphite California Computer Products company information printed along the bottom edge of the paper datę unknown: circa 1960’s – 1970’s

no visible inscriptions date unknown: circa 1960’s – 1970’s

signed lower right in ink titled and numbered 1/1 lower left in graphite date unknown: circa 1960’s – 1970’s

signed lower right in green ink titled and numbered 12/75 lower left in graphite CALMA Company information printed along the bottom edge of the paper Winsor & Newton company label printed on the back of the matboard date unknown: circa 1960’s – 1970’s

signed lower right in ink titled and numbered 1/1 lower left in graphite date unknown: circa 1960’s – 1970’s

signed, copyrighted, and dated lower right in red ink titled lower left in graphite

signed lower left in red ink titled and numbered 3/25 lower center in graphite date unknown: circa 1960’s – 1970’s