It was used in the pageant (at the NY Fair during 1939-40) to represent Union Pacific No. 119 at the joining of the rails of the first transcontinental railroad at Promontory Summit, Utah, on May 10, 1869. And BTW, the 35 was backdated to represent B&MR for the 50th anniversary celebration of the Burlfngton's arrival at Denver in May 1882. It carried B&MR lettering for that, but by the next year when it went to Chicago's Century of Progress Exhibition it had been relettered CB&Q.
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