In context of overlay "Things" – Underground Fire Hydrant – https://osm.org/node/13481894710 via StreetComplete 62.2:

Hier trifft sich HW5 und HW36.

Attached photo(s):
https://streetcomplete.app/p/325124.jpg
https://streetcomplete.app/p/325125.jpg
https://streetcomplete.app/p/325126.jpg
https://streetcomplete.app/p/325127.jpg
https://streetcomplete.app/p/325128.jpg