Further information:
In mound no. 9, Oluf Rygh excavated this brooch alongside a clay spindle whorl in 1870. An arrowhead was also found, likely remnants of an arrow shot into the mound sometime after the burial was constructed. The dating of the grave is based on similar brooches from the 5th and 6th century.  

This type of brooch may be described as a small copper alloy brooch with a four-sided head-plate and a spade-shaped foot. The decoration is modest, with only a vaguely incised Z shape pattern on the bow close to the head-plate.   

These types of brooches have spread to Scandinavia, most likely from areas around the Baltic Sea, indicating long trade routes and contacts. Along these same routes, highly sought-after amber also originates from the same areas.

The brooches come in different forms. This particular brooch seems to be of a Norwegian type, also found in the areas of Rogaland and Hordaland, as well as further north along the western coast towards Sognefjord and Lofoten.