Anchor Hocking #E53-610 Vitrock vase 1940-78

This vase is 9" high x 3" base x 4" widest. The design was fired on. It is a classic vase from this maker. I was surprised to not find one of these on CW. I don't see these in the wild very often and when I do, they go from $20-$40 for a mint one. I picked this one up for $1.66, including tax. This style of white glass from Anchor Hocking is called "Vitrock". Note the circle on the bottom of the vase, which appears on a lot of Anchor Hocking glass, especially vases. I wonder if the name "Hoover" often mentioned with Hocking glass may have something to do with this circle, maybe some vacuum process that is part of molding the glass? This vase was made in a two part mold.

This Vitrock vase was also made with the decoration in blue and in un-decorated fired on solid ruby and yellow. Anchor Hocking also made the Vitrock vase with Flamingos in red or blue. I have never seen a flamingo vase in the wild.

https://www.kovels.com/collectors-questions/vitrock-depression-glass.html

https://www.collectorsweekly.com/glassware/anchor-hocking

https://en.wikipedia.org/wiki/Anchor_Hocking