Alco's contuing improvement of the RS-2 road switcher led to the Model RS-3 in mid-1950. The uprated GT581 traction generator and the 1,600 h.p. V-12 244 prime mover resulted permitted an optional weight of 250,00 pounds. Unlike the earlier RS-2, dynamic brakes were available on the RS-3, and steam generators could be installed in the short hood. Though most roads ran the RS-3 long end forward, many roads ran the sort hood forward. offshoots were the RSC-3 series with A1A-A1A trucks and the RSD-4 and RSD-5 with C-C trucks.

The Division Point and Ajin Train Models will offer the RS-3 in various roads and paint schemes. Since many RS-3s continue in service, later schemes will also be offered.

This group is the first of multiple groups! Other groups will feature later paint schemes and second- and third-hand owners!

Schenectady-built to RS-3 Specifications E1662A and E1662B, RSD-4 Specification E1663 and RSD-5 Specification E1664: