That's gorgeous. Here's the text from the picture which answers a couple of questions I was about to ask, namely, how big is it and how were the decorations made-
This small bronze ball was found at Walston in Lanarkshire. It is unique, without any known parallels, and its purpose is not known. The decoration suggests that it might date sometime between 200 and 800 AD.
The ball is decorated with spiral lines, made when the object was cast. Similar spirals are found on late Roman dragonesque brooches, and on early Christian manuscripts and metalwork. Dimensions:1.5"
-Chris