The Trainz SKU for this item is P12376523

Trainz Product Id: 11441966

The Trainz SKU for this item is P12003566

Trainz Product Id: 12380785

Marklin 39912 HO Union Pacific Class 3900 Challenger Heavy Steam Loco & Coal ProductID_11423502 The Trainz SKU for thisThis is a Marklin 39912 HO Scale Union Pacific Class 3900 Challenger Heavy American Freight Steam Locomotive #3969. The locomotive has an mfx+ digital decoder and extensive sound functions. Different operation sounds such as coal and water being replenished or the sounds of opening and closing the sliding windows and the ventilation hatch on the cab can be controlled digitally. The locomotive also has controlled high efficiency propulsion with a