This traveller was not seen in cache Welcome to Stockholm - Tervetuloa Tukholmaan! when I visited on October 26, 2012 (visit not logged at the cache page as I live not far away and have visited the cache earlier). There was no entry in the log book after liinakar who dropped the coin, there was no pencil in the box though.
Coin owner or cache owner, please mark the traveller as missing (move to Unknown Location) if it doesn't show up soon.