Edited original or duplicate;800 feet blue plastic canister;450 feet / 13 minutes / Kodachrome colour reversal / 1942 / Film with descriptive captions / No title or 'end' captions / Intervention of men from the breakdown train on an engine in a bomb crater, men are seen in the train getting prepared to go on the intervention (putting protective equipment on), first squad going to work, then relieved by another one for a break while GUS assist the first squad with anti-gas ointment and undressing; last footage shows when the job is completed, how the boots are removed / Fair physical condition, clean splices between sequences and few or discreet scratches