Medicine box, metal, first aid box, vintage

A vintage metal medicine chest with hook closure. On the metal box is a green cross in a cream-colored circle. Was this box used in the military? The vintage metal box is useful as a first aid box and fun to fill with plasters, bandages and adhesive plasters, for example. The vintage metal first aid box is in good condition, there is a small rust spot on the inside, see also the additional photos.