American
Tilt
Drypoint Eta [special proof]
Drypoint Kappa [special proof]
Drypoint Lambda [special proof]
, 1980
, 1981
![Drypoint Eta [special proof]](https://api.nga.gov/iiif/e7f4e14c-f266-4b3e-8981-9cec828495d8/full/843,/0/default.jpg)
![Drypoint Kappa [special proof]](https://api.nga.gov/iiif/d3138dde-9935-4612-8309-92d74464eeba/full/843,/0/default.jpg)
![Drypoint Lambda [special proof]](https://api.nga.gov/iiif/f2e1db6b-8d67-4964-8547-bdfdda54fe13/full/843,/0/default.jpg)
![Drypoint Epsilon [special proof]](https://api.nga.gov/iiif/931b0d88-3da6-475b-9a3f-dbdac553901d/full/843,/0/default.jpg)
![Drypoint Zeta [special proof]](https://api.nga.gov/iiif/51358fc0-5cb3-4175-96e9-1b6519a9fc0f/full/843,/0/default.jpg)
![Drypoint Nu [special proof]](https://api.nga.gov/iiif/fb508dd7-d411-4a80-ab24-628d8df5bab6/full/843,/0/default.jpg)
![Drypoint Gamma [special proof]](https://api.nga.gov/iiif/9abd8b66-c637-403e-bf5d-3a9356709bff/full/843,/0/default.jpg)
![Drypoint Theta [special proof]](https://api.nga.gov/iiif/86d9b732-bd19-4790-b277-3298550bbd77/full/843,/0/default.jpg)
![Drypoint Delta [special proof]](https://api.nga.gov/iiif/6467a0f7-a7ae-40fc-98b2-b27ea13e71b0/full/843,/0/default.jpg)
![Drypoint Beta [special proof]](https://api.nga.gov/iiif/ea062f42-eb4f-4b0f-9986-7ed3aff8c56c/full/843,/0/default.jpg)
![Drypoint Mu [special proof]](https://api.nga.gov/iiif/773313f4-2297-4ac3-a5b1-01d924ed5745/full/843,/0/default.jpg)
![Drypoint Iota [special proof]](https://api.nga.gov/iiif/9b263b97-cc79-4100-b2a1-3b520bdb0db2/full/843,/0/default.jpg)
