MMI-PSC D&RG class 42
The model is supposidly a D&RG class 42
This class consisted of both 8-18c plan 9 locomotives as well as 8-18.5c plan 2 locomotives
Gray shaded area in the table indicate a locomotive offered by MMI 
Yellow shaded area are other D&RG locos which could be modeled using the MMI model
Baldwin D&RG 4-4-0 orders D&RG roster
Bdw Class Plan Date D&RW cls Bld no, date Rd No, name Driver size and other specs
8-16c - 11   Feb 1876   Class 37 3867 - 1876 No 16, Pike,     44" drivers
8-16c - 12   Feb 1876   Class 37 3869 - 1876 No 17, Greenhorn,      44" drivers
8-16c - 13   Feb 1876   Class 37 3871 - 1876 No 18, Spanish Peaks,     44" drivers
8-18c - 43 Plan 9 May 1878   Class 38 4331 - 1878 No 26, Rio Bravo     45" drivers Lake & Gold Style 49
8-18c - 48 Plan 9 Aug 1879   Class 38 4738 - 1879 No 35, Culebra     45" drivers
8-18c - 52 Plan 9 Dec 1879   Class 38 4825 - 1879 No 36, San Juan     45" drivers
8-18c - 55 Plan 9 Mch 1880   Class 42 4948 - 1880 No 85, Fort De Remer     45" drivers, wagon top boiler
8-18c - 56 Plan 9 Mch 1880   Class 42 5042 - 1880 No 86     45" drivers, wagon top boiler
8-18c - 57 Plan 9 Mch 1880   Class 42 5053 - 1880 No 87     45" drivers, wagon top boiler
8-18.5c -24 Plan 2 Jan 1880   Class 42 5098 - 1880 No 88     45" drivers, wagon top boiler
8-18.5c -25 Plan 2 Jan 1880   Class 42 5105 - 1880 No 89     45" drivers, wagon top boiler
8-18.5c -26 Plan 2 Jan 1880   Class 42 5106 - 1880 No 90     45" drivers, wagon top boiler
8-18.5c -27 Plan 2 Jan 1880   Class 42 5107 -1880 No 91 Ten Mile     45" drivers, wagon top boiler
8-18.5c -29 Plan 2 Jan 1880   Class 42 5118 - 1880 No 92, Mogollon     45" drivers, wagon top boiler
8-18.5c -30 Plan 2 Jan 1880   Class 42 5119 - 1880 No 93, Roaring Forks     45" drivers, wagon top boiler
8-18.5c -31 Plan 2 Jan 1880   Class 42 5139 - 1880 No 94, Gunnison     45" drivers, wagon top boiler
8-18.5c - 32 Plan 2 Jan 1880   Class 42 5140 - 1880 No 95, Embuda     45" drivers, wagon top boiler
8-18.5c - 33 Plan 2 Jan 1880   Class 42 5144 - 1880 No 96, Morena     45" drivers, wagon top boiler
8-18.5c - 35 Plan 2 Jan 1881   Class 42 5425 - 1881 No 99, Kokomo     45" drivers, wagon top boiler
8-18.5c - 36 Plan 2 Jan 1881   Class 42 5436 - 1881 No 100, Hesperis     45" drivers, wagon top boiler
8-18.5c - 37 Plan 2 Jan 1881   Class 42 5441 - 1881 No 101, Col. Boone     45" drivers, wagon top boiler
8-18.5c - 49 plan 6 Jan 1883   Class 42.5 6631 - 1883 No 107,      45" drivers, 42" straight boiler Black & Color, style 69
8-18.5c - 50 plan 6 Jan 1883   Class 42.5 6632 - 1883 No 108     45" drivers, 42" straight boiler Black & Color, style 69
8-18.5c - 51 plan 6 Jan 1883   Class 42.5 6633 - 1883 No 109     45" drivers, 42" straight boiler Black & Color, style 69
From: 
Baldwin Class list, Plan list
Micorfilm, CSRM
Steam in the Rockies, A Denver Rio Grande Roster 
Colorado Railroad Museum, Golden Colorado, 1963
Locomotives of the Rio Grande, A detailed Locomotive Rodster of the Rio Grande System 1871 - 1980
Colorado Railroad Museum, 1980