1949
National Gallery of Art, 1739
National Gallery of Art, 1792
National Gallery of Art, 1503
National Gallery of Art, 1956
National Gallery of Art, 1941
National Gallery of Art, 1762
National Gallery of Art, 1521
National Gallery of Art, 1939
National Gallery of Art, 1918
National Gallery of Art, 1512
Williams, Dave H. and Reba W., 1954
![Hourglass on an Inscribed Tablet [reverse]](https://api.nga.gov/iiif/932f3213-b9ff-4c28-ba9e-3fb71fbf1d4f/full/843,/0/default.jpg)
