In context of overlay "Things" – Boundary Stone – https://osm.org/node/13577175176 via StreetComplete 62.2:

N147, 1564 / N155 / 248

Attached photo(s):
https://streetcomplete.app/p/328115.jpg
https://streetcomplete.app/p/328116.jpg
https://streetcomplete.app/p/328117.jpg