I don't know, but I did just realize there was another thread similar to this one before she thought this one up (and truth be told, I was thinking about creating this thread myself at the same time it popped up, but I had a "premiere date" set for the week after its eventual creation here, and now).
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SP 2467 by
SP8254
Steam Engine for the Southern Pacific Railroad, as seen in the California State Railroad Museum
(Also, I think its made possible by the painstaking efforts of me, as the unofficial moderator for this topic, Esoteric, LoganSnake, Fly, BadNick, and a few others, and noodle's blunder about the numbers a few dozen pages back that allowed this to happen: pictures of numbers following the actual post # in the thread. Just genious.)