A chronicle about the past and present of Gotland, Sweden, and preparedness in the event of war.
| Release Date | January 1, 1943 | |
|---|---|---|
| Status | Released | |
| Original Title | Östersjöns nyckel | |
| Runtime | 12min | |
| Budget | — | |
| Revenue | — | |
| Language | Swedish | |
| Original Language | Swedish | |
| Production Countries | Sweden | |
| Production Companies | ||