4561-1 (Inv) Railway Express with Transformer and Speed Regulator 618 Parts, 9 Minifigures, 1999 Sets: Train: 9V
* Change 2 Part Black {2972 Train Base 6 x 34 Split-Level with Bottom Tubes (Undetermined Type) to 2972b Train Base 6 x 34 Split-Level with Bottom Tubes and Hole at Each End}
Comments from Submitter:
From two NIB copies I owned.
The instructions shows the version with one hole too.