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        The source for my UP symbols for this day says the computer shows the 4131 as the lead on the wb ZAPLA-15. This photo shows an eastbound train, not a west, and I never heard the symbol on it, so I don't know.  The 4131 is just starting down the eastern slope and is already running pretty fast. Fast enough to have gotten a bit of a jump on the conductor. Last train that they met, he was easily off his train and in position for the roll-by, well ahead of when they met.