National Defence-Army Fire Extinguisher

This is a National Defence-Army fire extinguisher. It's made of brass and has a pressure gauge that reads 'FULL'. The inspection tag indicates it's a recharged unit. Very cool item. Extremely heavy. You can hear that theirs still liquid inside. To use, suspend unit from ceiling upside down. If ever there’s an emergency, it would release on its own under pressure. 🤔