An industrial short produced by Pražská železářská společnost (Prague Ironworks Company) in 1939, the film contains footage from the shorts Výroba oceli (Steel Production, 1939)—today presumed lost—and Poklady země (Treasures of the Earth, 1939), both directed by Karel Kohout.
| Directing | Jiří Lehovec | Director |
| Camera | Václav Hanuš | Director of Photography |
| Sound | Sláva Eman Nováček | Original Music Composer |