Re: research info needed on C&S 638-Correction

The 647 handled a Denver-Rex Trip on July 19,1959(which we have a few shots of on film), and again on October 25th Denver-Lyons.
Another 2-8-0 the 638, after arriving from leadville, was shopped and handled excursions from October 2, 1960 until Dec 16, 1962.
C&S 641 continued to work the Leadville branch 5 days a week until Oct. 12, 1962, making it the last steam on a class one to operate in Regular service.
While 638 ran after the 641's last run at Leadville, there were more trips on the C&S,with the 2 Burlington engines, 4960, and 5632. We have a bit of that as well.
So, yes the mystery trip we are trying to determine is likely 1961 or 1962!
Sounds like your dad had some good stuff in the 50's, but not likely 638.
Greg