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Inscription

lower right below platemark in graphite: OK #16/4 / SC [circled]; lower right in graphite by unknown hand: #16 / 1. Back c / → 2.) spit / cahrB / concent. / upside / down / 3. Blue / 4. Yellow / 5. Red / 6. Spit charB / con / Right side / up / (30 x 20#4; lower right verso in graphite by unknown hand; Color & Black, 30x20/4# OKTP

Provenance

Kathan Brown, San Francisco; gift to NGA, 2011