The film shows the miners' dedicated work on the construction of a tunnel connecting two mines—lead and zinc.
| Release Date | January 1, 1955 | |
|---|---|---|
| Status | Released | |
| Original Title | Szarlejka | |
| Runtime | — | |
| Budget | — | |
| Revenue | — | |
| Language | Polish | |
| Original Language | Polish | |
| Production Countries | Poland | |
| Production Companies | Wytwórnia Filmów Dokumentalnych | |