Here is an MTH 20-2147-1 Amtrak EMD F40PH Diesel Locomotive #300 with Protosound (3-Rail) from 1997.
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 Over 5 Pounds
Intricately Detailed ABS Body
Directional Constant Voltage Headlights
Measures Approximately: 15 1/2″ x 2 1/2″ x 3 5/8″
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
Equipped With ProtoSound System Featuring Freight Yard Proto-Effects

This item has been graded per TCA standards C-7: Excellent based on visual appearance. There are light nicks and scratches on the surface of this item. The wheels show average run-time. Some minor trim elements are misaligned, bent, damaged or missing. 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 Excellent.

Condition: Excellent (C-7)
Operational Status: As is
Original Box: Yes (P-6)

Manufacturer: MTH
Model Number: 20-2147-1
Years Manufactured: 1997 – 1997
Road Name: Amtrak (AMTK/AMT)

Scale/Era: O Modern
Model Type: Diesel Loco

The SKU for this item is 5983848.

Product Id: 11449256