The smooth surfaces are modern filler to make the object whole. The pitted and damaged surfaces are pieces of the original. It'll be hollow since they thought

The smooth surfaces are modern filler to make the object whole. The pitted and damaged surfaces are pieces of the original. It'll be hollow since they thought it was a vase. It's unlikely the filler is solid, these reconstructions are generally made as faithfully as possible to the original without too much synthesis. So it should be the same shape as the original is presumed to have, but no engravings or anything which might be unreasonably speculative.