When the Class NUMBER@1 series for self-propelled locomotives was introduced , some locomotives in this series were renumbered to Class NUMBER@1 , leaving the 968xxx numbers just for locomotives that were no longer self-propelled .

Before the introduction of the MISC@1 , Class NUMBER@1 was issued to self-propelled locomotives in departmental -LRB- non-revenue earning -RRB- use , ORGANIZATION@1 had such locomotives numbered in a variety of series , together with locomotives that were no longer self-propelled .
