It incorporated some design features from tanks developed by American engineer Walter Christie

Model Number: 48504

Trainz Product Id: 12309489

Pantograph lock-down prevents accidental operation on layouts with low clearances

Model Number: 7921

Mantua 393006 HO Bethlehem Steel 0-6-0 Powered Tank Switcher #15 ProductID_12360894 It incorporated some design featuresThis is a HO Bethlehem Steel 0 6 0 Powered Tank Switcher #15. This item features plastic trucks, operating knuckle couplers, metal wheels and axles, and a motor. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Mantua Model Number: 393006 Road Name: Bethlehem Steel (BSCX) MSRP: $79. 98 Scale Era: HO Scale Model Type: Steam Loco The Trainz SKU for this item is P11499442. Trainz Product Id: 11499442