Found in and old junk shop: a Union Pacific marked creamer, saucer, and sugar bowl with cover. The sugar bowl and creamer stand about 2 ¼" tall, and the saucer is about 3 ¼" in diameter. Condition appears to be mint.

UPDATE: I have learned that these pieces are likely not authentic railroadiana, but are more likely fantasy pieces, as described in this article: http://www.railroadiana.org/fakes/pgFakes_China_Fantasy.php While these specific items are not shown in the article, the similarity to some of the items that are shown can't be overlooked.