Robinpeck
Yes,they operated under the Russians for a while,right after the war as JP SAUER.When they went to West Germany in the 50s,it was really just the "name".The plant,parts,etc.stayed in Suhl.The plant kept making guns,but under other names.I think the ones marked Fortuna were made there.The West German SAUERs were a different model altogether and not like the older SAUERs.The new SAUERs were still fine guns on their own.
Mike