| Answer | Crossword Clue |
|---|---|
| USSR | Empire until 1991: Abbr. |
| SSR | Part of an empire up to 1991: Abbr. |
| SSR | Map abbr. until 1991 |
| USSR | Atlas abbr. until 1991 |
| SSR | Estonia, until 1991: Abbr. |
| SSR | Kazakhstan, until 1991: Abbr. |
| SSR | Belarus, until 1991: Abbr. |
| SSR | State until 1991: Abbr. |
| USSR | World power until 1991: Abbr. |
| SSRS | Union members until 1991: Abbr. |
| SSR | One of 15 until 1991: Abbr. |
