His last important posting , between 1984 and 1989 , was as Commercial Counsellor at the East German embassy in Prague .
Returning to Berlin , between 1974 and 1984 Bittner held a senior post in the Ministry for Foreign Affairs .
Bittner 's last important posting , between 1984 and 1989 , was as Commercial Counsellor at the East German embassy in Prague .
Returning to Berlin , between 1974 and 1984 Bittner held a senior post in the Ministry for Foreign Affairs .