Roadside Pylon #70
The header points to the cache, with a deviation of +/-2000m. The picture may be of help.
You can check your result here:
The container is slightly bigger than a micro; space for trading items is very limited.
If you want to learn something about these interesting objects, go to Delineator or Leitpflock
The serial number of that pylon, by the way, is "NPE9H082". I doubt that this information is helpful, but I'm giving it anyway ;-)