MTH Premier RS-3 Diesels - 2026

There are diesel locomotives, and then there are legends. The American Locomotive Company (Alco) RS-3 belongs firmly in the latter category. Now, MTH Electric Trains is proud to bring this workhorse of the high iron to your O Scale layout with a level of detail and sound fidelity that must be heard to be believed.

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221592
O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221582
O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221572
O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221562
O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221552
O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221542
O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221532
O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221522
O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221512
O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221502
O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221492
O Scale Premier RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221482
O Scale Premier Pennsylvania RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Pennsylvania RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Pennsylvania RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221472
O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221462
O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221452
O Scale Premier Lehigh Valley RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Lehigh Valley RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Lehigh Valley RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221442
O Scale Premier Lehigh Valley RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Lehigh Valley RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Lehigh Valley RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221432
O Scale Premier Conrail RS-3 - Hammerhead Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

Sale

O Scale Premier Conrail RS-3 - Hammerhead Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Conrail RS-3 - Hammerhead Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

$619.95

Sale price $619.95 Regular price $699.95

SKU: 22221422
O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

Sale

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

$611.95

Sale price $611.95 Regular price $679.95

SKU: 20221591
O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

Sale

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

$611.95

Sale price $611.95 Regular price $679.95

SKU: 20221581
O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

Sale

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

$611.95

Sale price $611.95 Regular price $679.95

SKU: 20221571
O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

Sale

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

$611.95

Sale price $611.95 Regular price $679.95

SKU: 20221561
O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

Sale

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

$611.95

Sale price $611.95 Regular price $679.95

SKU: 20221551
O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

Sale

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

$611.95

Sale price $611.95 Regular price $679.95

SKU: 20221541

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MTH Premier RS-3 Diesels - 2026

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O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Providence & Worchester RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Northern Pacific RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Pennsylvania RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Long Island RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Lehigh Valley RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Lehigh Valley RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Conrail RS-3 - Hammerhead Diesel Engine w/Proto-Sound 3.0 (Scale Wheels)

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Jersey Central RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Boston & Maine RS-3 - Phase 3 Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)

O Scale Premier Delaware & Hudson RS-3 - Phase 1b Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels)