1966
Gemini G.E.L., 1969
Gemini G.E.L., 1977
Josef Albers, 1962
Gemini G.E.L., 1990
Gemini G.E.L., 1976
Gemini G.E.L., 1975
Gemini G.E.L., 1971
Josef Albers, 1970
Gemini G.E.L., 1973
Gemini G.E.L., 2007
![Figure 4 [experimental trial proof]](https://api.nga.gov/iiif/751d8a1e-a0dc-4d55-9070-cb1081769801/full/843,/0/default.jpg)
![Untitled [trial proof 4]](https://api.nga.gov/iiif/0b1724b6-38e7-462a-bf0a-9dd3fc8479de/full/843,/0/default.jpg)
![Untitled [working proof]](https://api.nga.gov/iiif/b4be5e7e-80be-48a1-a581-18d55dbcc60b/full/843,/0/default.jpg)
![0 through 9 [working proof]](https://api.nga.gov/iiif/8e7dce8d-eb00-4aa9-b0d5-4ccf95263a08/full/843,/0/default.jpg)
![Ale Cans [trial proof B]](https://api.nga.gov/iiif/4a4c5bb5-2ca9-49de-84d9-5f3335403270/full/843,/0/default.jpg)
![Ale Cans [trial proof G]](https://api.nga.gov/iiif/d6a5e8a6-2788-4caa-b086-467927dc7c36/full/843,/0/default.jpg)
![Leg [proof]](https://api.nga.gov/iiif/6d05d89e-df0e-49fd-9c83-17f9b4df181d/full/843,/0/default.jpg)
