Hidden drive train and electronics

This is an Atlas 3002425 O Krey's 36' Wood Refrigerator Car (2-Rail)

and later on

Here is a MTH 30-78040 Coors Light Silver Bullet Operating Reefer Car

The Trainz SKU for this item is P11451029

Academy 13525 1:35 German Sturmpanzer IV Brummbar Mid Version Military Tank Kit ProductID_11490253 Hidden drive train and electronicsThis is a Academy 13525 1 35 German Sturmpanzer IV Brummbar Mid Version Tank Condition: Factory New Operational Status: Functional Original Box: Yes Manufacturer: Academy Model Number: 13525 MSRP: $75. 00 Category 1: Model Kits Category 2: 1: 35 The Trainz SKU for this item is P12415789. Trainz Product Id: 12415789