forgot to mention
the drgw historical modeling socioty has the roster of the narrow gauge and standard gauge locomotives coupled with any shots of them by otto perry if you look up the various engins baised on the acutriments you can tell where any one engin was based at any one time period a good identifier is the tool boxes
a box on the pilot deck is salaida gunnison and motrose
a box on the fiermans side of the smokebox mounted behind the builders plate is alamosa
and a box mounted on top of the cab is durango