Here is an MTH 20-2173-1 Erie-Lackawanna EMD GP-9 Diesel Engine w/PS1 #1260.

Features:
2 Precision Flywheel Equipped Motors
1/4″ Scale Detail & Dimensions
All-Metal Wheels & Gears
Compatible With Most AC Transformers
DCRU Electronic Reverse By QSI
Die-Cast 4-Wheel Trucks
Weighs Almost 4 Pounds
Intricately Detailed ABS Body
Directional Constant Voltage Headlights
Measures Approximately 14 1/2″ x 2 7/8″ x 3 7/8″
Die-Cast Trucksides, Pilot & Fuel Tank
Lighted Cab Interior
Cab Engineer Figure
Operating Die-Cast Metal Couplers
Stamped Metal Floor
Operates On O-31 Track
Operating Proto-Smoke System
Includes Protosound Digital Sound With Speaking Brakes & Freight Yard Sounds By QSI

This item has been graded per TCA standards C-8: Like New based on visual appearance. The instruction manual is not included. The original box is included. Please check the photos for a detailed look at this item. Overall condition is Like New.

Condition: Like New (C-8)
Operational Status: As is
Original Box: Yes (P-7)

Manufacturer: MTH
Model Number: 20-2173-1
Road Name: Erie Lackawanna (EL)

Scale/Era: O Modern
Model Type: Diesel Loco

The SKU for this item is 5957837.

Product Id: 11407787