X | 21c | dlbl | Chester A. Arthur |
X | 21c | grn | Amadeo P. Giannini |
X | 21c | olgrn & red | railroad mail car 1920s |
X | 21c | Chester Carlson |
X | 21c | multi | buffalo | — | — |
- | 21c | multi | Abraham Lincoln |
- | 21c | multi | Abraham Lincoln - coil | — | — |
X | 21c | red & bl & blk | USA & Jet |
X | 21c | multi | biplane hang-glider | |||
X | 21c | multi | Octave Chanute & Hang glider |
- | 21c | multi | Chester A. Arthur |
- | 21c | multi | Chester A. Arthur | — | — |
- | 21c | multi | Euchromia lethe |
- | 21c | multi | Rhipidura leucophrys |
- | 21c | multi | Maia, by Picasso |
- | 21c | multi |
- | 21c | multi |
- | 21c | multi |
- | 21c | multi |
- | 21c | multi |
- | 21c | multi |
- | 21c | ltbl | wing & globe |
- | 21c | multi | "Madonna and Child" - detail, Agnolo Bro |
- | 21c | multi | Dicrurus hottentottus |