Kurt,
As the scrappers moved slowly east in Platte Canon, they not only pulled up the rail but all the right of way signs as well. I suspect that certain of the train crew stowed them on engine 71 to take home as souvenirs. There are several photos in the Klinger's books with number 71 festooned with a variety of signs, especially speed limit signs.
And Tom it is good to see you here again, glad you are well. In the second year of Covid I get nervous when people don't post for a while. Hear that Keith Hayes! And you John Greenly, are you doing okay?? What about the other South Park??
Jim Courtney
Poulsbo, WA