This is a vintage Crest-O-Gold Boulder Colorado china tea cup and saucer.
These pieces are white with 22K warranted gold trim with tiny flowers, and feature the Flatlands of Boulder Colorado.
The saucer measures 5" in diameter, and the cup measures 2.25" tall, 3.25" wide including the handle, and 2.5" in diameter.
These pieces are in good pre-owned condition but have wear of the 22K gold band.