A series of measuring knobs are visible on the statue of the deity at the centre of this image. Why these were left is not clear. They might have been simply forgotten, but considering this relief was re-used in the Constantinian period there was plenty of time for them to be removed. Alternatively, it is possible that these points were left on the surface to indicate that this particular representation of the deity was copied from a famous originals or even to show that this is a statue that is depicted. How these measuring points were used has been variously discussed in the literature on Roman sculpture but they are certainly not marks of the pointing machine, which was a much later invention.