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MTH Trains - Maryland Midland Railway GP-20 Diesel Engine With Proto-Sound 2.0 (30-2973-1) Items for Sale
Year Released: 2010
Part Number: 30-2973-1
Category: Diesel
Railroad: Maryland Midland Railway (MMID)
Gauge: O Gauge
Engine Model: GP-20
Minimum Curve: O-31
Unit Measures: 14 7/8" x 2 3/4" x 4"
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Last Updated January 23, 2026, 9:00 pm
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