American
Stage Coach from Americana Suite
Clipper Ship from Americana Suite
Fire Engine from Americana Suite
1984
Earth Day
Union Pacific
Bent "Blue" [working proof]
Bent "Blue" [trial proof]
Life Mask
Double Face
, 1968
, 1969
![Bent "Blue" [working proof]](https://api.nga.gov/iiif/25190e59-6ffb-4652-ab02-8434c9babb59/full/843,/0/default.jpg)
![Bent "Blue" [trial proof]](https://api.nga.gov/iiif/0897b9bd-7a5c-4315-b3e0-da35c5fc8db7/full/843,/0/default.jpg)
![Figure 0 [trial proof]](https://api.nga.gov/iiif/849a68d0-2787-484b-bf08-657f88ed5cbe/full/843,/0/default.jpg)
![Figure 7 [working proof]](https://api.nga.gov/iiif/6c0a537e-66ff-48ef-8b3c-04f8642b8dd9/full/843,/0/default.jpg)
![Figure 7 [trial proof]](https://api.nga.gov/iiif/f3771b79-765f-4336-addb-4c11704fc68d/full/843,/0/default.jpg)
![Figure 8 [trial proof 1]](https://api.nga.gov/iiif/b8b57cc4-855c-4328-9372-a9544001019a/full/843,/0/default.jpg)
![Figure 2 [trial proof]](https://api.nga.gov/iiif/930cf5fa-7d8d-41e4-bbec-72c789f21af1/full/843,/0/default.jpg)
![Figure 0 [working proof]](https://api.nga.gov/iiif/658caee7-27e7-46e9-835c-95151bdba9e6/full/843,/0/default.jpg)
![Figure 8 [trial proof]](https://api.nga.gov/iiif/5fdf5575-6697-4c6a-9532-93c7913936d7/full/843,/0/default.jpg)
![Figure 9 [trial proof]](https://api.nga.gov/iiif/af957deb-7c45-4369-8638-4c2240390375/full/843,/0/default.jpg)
![Figure 4 [experimental trial proof]](https://api.nga.gov/iiif/751d8a1e-a0dc-4d55-9070-cb1081769801/full/843,/0/default.jpg)
![Figure 4 [working proof]](https://api.nga.gov/iiif/1b40501b-1a1a-4c49-9a62-8d0bc7f31ac3/full/843,/0/default.jpg)
![Figure 5 [trial proof]](https://api.nga.gov/iiif/3c6381f9-6897-4af8-b288-bf83587aeb83/full/843,/0/default.jpg)
![Figure 8 [working proof]](https://api.nga.gov/iiif/a47feac4-f09e-47d8-98a9-69c3936a89c4/full/843,/0/default.jpg)