Olaf, you could be right. I had Jimmy do some research and on June 27, 1966 My brother, father and I chased a work extra with two water cars. That was a roundtrip Durango to Gato. We only chased as far as Gato, and apparently left for home. At least I think we left for home right away. If we had gone back to Durango why did we not chase the train at the same time. Anyway I do not have an explanation of the roundhouse shot with all the engines. The image has a 66 date on it though. I just assumed we stayed overnight in Alamosa on the 27th, and shot this on the 28th before heading home. I know I was not there in 1967, and in 1968 I shot nothing but color slides. The only other possible explanation would be 1960-61, but that year we chased a freight from Alamosa west with 494 and 495. Clearly 494 is out of service in my black and white. The shot near the shop I believe is either 1956(Memorial Day time frame), or 1960-61. More likely 1956.
Here are photos chasing 484 on the 27th of June 1966.
Greg
Scenes are
Along the relocation trackage between Arboles and Gato
Pacing along the same area
Arrival in Gato
Durango before the run.