Swirl was made by Jeannette Glass during the depression. The Ultramarine color was only produced for 1 year - from 1937 to 1938. The blue-green colored glass was very unstable and would burn easily, so production was limited. Offered here is the creamer in perfect condition. The color shades towards the blue end (more desirable) rather than green. I have 2 available, price is per creamer. See my other listings for more in this pattern.