This traveller seems to have left cache Mörka Slingan according to geocoin logs below by Nemo04 and jober72. In his log April 5, 2012 for cache Challenge #054 - Log 50 mysteries GC1W5A1 cacher Barrysoff adds a photo of the coin.
Coin owner, please move the traveller to that cache if it doesn't show up somewhere else soon.