Woah! Hold on there, Podna!

Steve, you have to be kidding! That numberplate WAS fabricated for #9 by the C&S shops in Denver.
What could be better than that? Let the class of 1939 C&S shops be represented by that fine numberplate they made for #9 in her new glory days on the new Loop. They probably all knew they'd never see her again in this world when she got shipped off to New York. The original high bridge was long since scrapped at that time. Those old boys would burst the buttons and snaps on their overalls to have even thought in their wildest dreams that the good old #9 would be steaming over a new and improved high bridge in "aught" six. That's be TWO "aught" six.
Besides, that plate on #71 may have been used on the C&S, but even it isn't a C&S plate. Remember that not a single narrow gauge engine used by the C&S narrow gauge was acquired new for by C&S. Every one of those engines was CC, UPD&G, U&N, DSP&P, C&N/DB&W, or possibly a couple other possibilities. The one on #71 could be from the UPD&G the DL&G, or whatever.
You have a C&S (rebuilt) engine, a genuine bona-fide C&S numbeplate made for that engine by the 1939 shops, use your money for something else. Like cab seats. Awnings. Antlers.
How about more holiday bunting? I'd rather you paint the 74's tender red than remove that plate. It's been on #9 for 67 years, and that is more than half the engines life. Please leave it there.