During excavation work in a protruding sand hill next to Slumpberget in Boden municipality, a find of archeological objects was made in 1940. At work, a number of objects had been thrown up without the workers noticing. When the damp sand dried, the objects became more visible and were used temporarily by a school student from Boden. During the summer of 1942, an inspection of the site was carried out and more objects and human remains could be taken care of and collected at the Norrbotten Museum. The find was named after a nearby lake, Brotjärn.
The find consists of unburned human remains, preserved remains of leather straps with associated braces, belt distributors and bronze belt fittings. The find also found a slate whetstone, two fragments of band-shaped finger rings made of silver, a small piece of flint, three fragments of iron which all probably constitute remnants of knife blades, a number of fragments of bronze sheets and four fragments of woolen cloth in twill binding.