Tulloch Boundary Marker 33

Coflein says there are two stones here – one inscribed ABD 33, indicating ‘the limits of the Freedom Lands’. The other is a granite boulder which has a ‘roughly cup-shaped hollow on its upper suface’. Is it not nice that they did not hammer the letters into the older stone, but brought a new one to the same place? Or perhaps there’s actually some dull reason like boring regulations for the new boundary stones to be all exactly the same shape and size.