1969–1970
Richard Hamilton, 1949
Petersburg Press, 1975
Petersburg Press, 1983
Petersburg Press, 1976
Petersburg Press, 1979
Petersburg Press, 1981
Richard Hamilton, 1990
Richard Hamilton, 1965
![0-9 [trial proof, figure 2]](https://api.nga.gov/iiif/758b90e8-499d-4f4a-9fe7-a6f121e44ed0/full/843,/0/default.jpg)
![3 [trial proof]](https://api.nga.gov/iiif/f6d06630-d0a2-49ba-b81c-25b07c046e86/full/843,/0/default.jpg)
![Hatching [trial proof 2]](https://api.nga.gov/iiif/13d8b819-152b-4e32-b3cb-fee7d2426d02/full/843,/0/default.jpg)
![Target with Four Faces [trial proof]](https://api.nga.gov/iiif/1fe7508f-a585-4dc1-a876-a95e56d06db4/full/843,/0/default.jpg)
![Periscope [state proof of 4th state]](https://api.nga.gov/iiif/39afade9-002f-47d9-b72c-8f7b31358a3e/full/843,/0/default.jpg)
![Figure 4 [trial proof 4]](https://api.nga.gov/iiif/11d355c0-74d2-49a6-86ef-8417f7b1296d/full/843,/0/default.jpg)
