Edit: In the meantime, I had contact with the owner, how cool!
Also, here's an English translation and a TL;DR:
TL;DR: We don't have the trackable (and feel sorry for you if it means it is still missing), but stumbled upon its discovery code.
The story: I discovered this trackable/coin when I cracked the cache "Msportis Coinlihaus der 2." and then was able to reverse-engineer some Coins/TBs of the owner Msporti as well. By pure chance / luck while testing out possibilities for this I also came across this TB/coin. We hope that it's okay that we discover it, if not, feel free to delete this log. TFTC/TFTT ;-)
Original log: Diesen Trackable / Coin habe ich entdeckt, als ich das "Msportis Coinlihaus der 2." GC3FTQR geknackt habe und dann auch einige Coins/TBs reverse-engineeren konnte. Per purem Zufall beim austesten von wenigen Möglichkeiten bin ich auch auf diesen Trackable gestossen. Ich hoffe, es ist okay, dass ich diesen discovere - falls nicht, feel free, diesen Log zu löschen. TFTC/TFTT ;-)