1966–1968
Gemini G.E.L., 1993
Gemini G.E.L., 1972
Gemini G.E.L., 1975
Gemini G.E.L., 2008
Gemini G.E.L., 1980
Gemini G.E.L., 1991
Gemini G.E.L., 1994
Gemini G.E.L., 1969
Gemini G.E.L., 1999
Gemini G.E.L., 2004
![Pushing Up [special proof]](https://api.nga.gov/iiif/831d94ff-c161-4f11-8d48-4207cd69c830/full/843,/0/default.jpg)
![Zone [working proof]](https://api.nga.gov/iiif/4b3f4381-5e08-419a-8416-d1a537194072/full/843,/0/default.jpg)
![Two Flags [trial proof C]](https://api.nga.gov/iiif/ac692c0c-0101-4523-be8a-daa4b4c23a73/full/843,/0/default.jpg)
![Figure 8 [trial proof]](https://api.nga.gov/iiif/fb80fd10-f303-4898-a20a-93b9da5683ec/full/843,/0/default.jpg)
![Figure 5 [trial proof]](https://api.nga.gov/iiif/12f83110-1324-4224-bd90-fe46408d0e3b/full/843,/0/default.jpg)