mhhh..
Well ..when i look back a few months I saw them always in EDDN and I was told they have been bought by FAI (Ambulance)
Also if you look for the FAi Webpage you can see the 604 as a Ambulance/Charter Aircraft for FAI.
then what i saw on Rosters the 604 flew a lot in Russia (PAX).
Jebus...Saturday morning English ....uhmm errrrrr
itīs....THE Fischmeister!!!