1989
Aldo Crommelynck, 1981
Aldo Crommelynck, 1976
Aldo Crommelynck, 1975
Alex Katz, 2000
Alex Katz, 1950
Alex Katz, 1959
Alex Katz, 1973
Aldo Crommelynck, 1979
![Periscope [state proof of 6th state]](https://api.nga.gov/iiif/125a0c2f-2e0b-4ab1-8689-8503cfc65859/full/843,/0/default.jpg)
![Untitled I [trial proof]](https://api.nga.gov/iiif/f5354a17-69d3-49af-a007-7e239a290a60/full/843,/0/default.jpg)
![Untitled II [trial proof]](https://api.nga.gov/iiif/62d94234-9c5d-4c5d-9f6d-3fbe4ac73b8c/full/843,/0/default.jpg)
![3 [trial proof]](https://api.nga.gov/iiif/f6d06630-d0a2-49ba-b81c-25b07c046e86/full/843,/0/default.jpg)
![Periscope [state proof of 3rd state]](https://api.nga.gov/iiif/812d905d-92c4-4f94-a05b-60de032a8af7/full/843,/0/default.jpg)
![Hatching and Flagstones [trial proof 3]](https://api.nga.gov/iiif/353112ec-6d71-44d6-88fe-c4aaa3a74cef/full/843,/0/default.jpg)
![Target with Four Faces [state proof of 1st state]](https://api.nga.gov/iiif/15baa359-5e43-4547-80e9-a245579452d7/full/843,/0/default.jpg)