1967
Gemini G.E.L., 1971
Gemini G.E.L., 1976
Gemini G.E.L., 1991
Benjamin B. Smith, 1972
Gemini G.E.L., 2004
Gemini G.E.L., 1977
Gemini G.E.L., 1969
Gemini G.E.L., 1973
Gemini G.E.L., 1968
![Coathanger and Spoon [trial proof]](https://api.nga.gov/iiif/b83ef090-d42f-4d87-913b-c375906c78be/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 15]](https://api.nga.gov/iiif/55152616-bdc8-4db4-94d1-fffd9fee52f0/full/843,/0/default.jpg)
![0 through 9 [trial proof]](https://api.nga.gov/iiif/418aeb8d-2947-407b-add1-3fb4ffbb6bf5/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 2]](https://api.nga.gov/iiif/21449e8a-3c47-418e-bdd1-e1f01ce02806/full/843,/0/default.jpg)
![Figure 0 [experimental proof]](https://api.nga.gov/iiif/8b7833fc-4575-4d90-823e-5ce94f37f8ce/full/843,/0/default.jpg)
![Gray Alphabets [working proof]](https://api.nga.gov/iiif/c7d881b5-8fca-4146-b30c-5820b30cbccc/full/843,/0/default.jpg)
![Figure 7 [trial proof]](https://api.nga.gov/iiif/f8b1a634-b575-4de8-8a02-6941a9c8338b/full/843,/0/default.jpg)