These look similar to stones that are built into walls in my part of Wales (Ceredigion). The cups function as sockets for bars. The stones usually appear as a pair. There are singletons where the other stone has either been robbed or there might have been a different arrangement. They often serve to support modern gates and have hinges attached.
All the best
Dave Parkes <[log in to unmask]> wrote:
I've posted some photos of possible standing stones from the farm in the
Staffordshire Moorlands I mentioned back in April (britarch passim "rock art
or not"- fossil freshwater bivalves actually)
They are built into a stone wall - there are others close by and will record
and post these too.
Please let me have any comments.
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