Donnerbüchse
Iron coaches
Columns: Class to 1928 | Class from 1928 | Seats | Quantity | Year(s) of Manufacture | Remarks
Bi-21 | Bi-21 | 40 | 10 | 1921/23 | Trial coaches | BCi-21 | BCi-21 | 16/34 | 10 | 1921/23 | Trial coaches | BDi-21 | BCid-21 | 16/39 | 10 | 1923 | Trial coaches | Ci-21 | Ci-21 | 58 | 10 | 1923 | Trial coaches | Di-21b | Cid-21b | 66 | 50 | 1922 | Trial coaches