Unable to answer "What’s the reference number of this postbox?" for https://osm.org/node/8301273604 via StreetComplete 43.0:

there are two mailboxes here with the same collection times. the left one (facing north) has location number 9470400087 and the right has 9470400079.

Attached photo(s):
https://westnordost.de/p/92689.jpg