American naval guns are built and tested in large factory.
Unused / unissued material. - Location and dates unknown / unclear.
Voiceovered American newsreel item.
United States of American (USA).
Men working in a steelworks / foundry. Shots of molten metal being made into guns for the American navy.
Various shots of very large barrels for naval guns being made and checked. Good shots of guns being fired on factory firing range. Shots of men test firing anti-aircraft guns. One of the large guns fired.