Fritz ,just a guess but it looks like one of the Morgans . Jim Shawcroft , an East End engineer , said that light engines sometimes would get off the hill in 45 minutes or less ! I forget how they were paid then ,but probably by the mile so it was not unheard of to do up to three Cumbres turns ,then take the train to Alamosa ! They had the 16 hour law then .So some crews liked working Cumbres because money could be made , especially after they accrued over 100 miles .
The well-known engineer who told me that tale said once he himself brought an engine off the hill in 45 minutes ,when he had to drive to Santa Fe that afternoon . I mangaged to do it in 52 or 55 minutes . Later we were all told to take one hour and five minutes with light engines . A few enginemen who liked to highball would pull the old trick of radioing their departure a few minutes early ,or so I was told .