lower right in graphite: SW Hayter 44; lower center in graphite: Cronos; lower left in graphite: 30/50; upper left in graphite: For Minna + Jack / 21-10/47 SWH
Jacob and Ruth Cole Kainen (RCK ownership stamp), Chevy Chase, MD; gift to NGA, 1994.
- Black, Peter and Desiree Moorhead. The Prints of Stanley William Hayter: A Complete Catalogue. Mount Kisco, NY, 1992.