upper left in graphite: RAVELLO / 14-5-'31; on verso calculations and grid in graphite; lower right verso in graphite: T710-x-1971
Marks and Labels
- M.C. Escher: A Centennial Tribute, National Gallery of Art, Washington; San Diego Museum of Art; The Chrysler Museum of Art, Norfolk, 1997-1999.
- "M.C. Escher", Knoxville Museum of Art, 2000.