This bowl is the earliest vessel in the Mildenhall treasure, made in Gaul in the third century AD.
It has a dropped horizontal rim and niello decoration. It was not designed to have a lid. The deep domed cover was made later, some time in the fourth century, either for another bowl, or perhaps specifically to fit this one. It has a border of Bacchic ornament in relief. The small statuette of a triton which forms a knob may not have been part of the lid's original design.