Ah, now I see that both are in the same position relative to the lug rivets and are filled with miss matched rivets. In which case then perhaps it was just filled in by the owner to hide the rivet holes as a personal choice, which I have seen done before. do they have the same paint on them as the rest of the helmet or have they been painted over? Or does all of it have an overpaint? Sorry but your pics are not the sharpest mate. Have you tried a magnet on it?