
Ysart glass does come under a kind of rather special category, it can be considered to be a kind of Studio Glass, but happening before Studio Glass was invented. That has a specific date, 23rd of March '63, when the Toledo lecture was given describing the small kiln that had been invented to allow glassmakers to work with small quantities of molten glass.
The Ysarts were a small family team of master glassmakers, operating on their own, without massive factory furnaces or facilities, making unique individual pieces to their own designs.
They worked in an old, leaky wooden shed in a cold climate. They didn't have sophisticated glass recipes. What they were doing was just incredible given how primitive the conditions were.
They have a unique place in the history of glass art. Your vase is not just hand-made - it is hand made in very difficult circumstances, and at a time when they were sticking their necks out in being years ahead in their thinking about what they were doing and without all the advances we have now.
I hope you continue to enjoy and appreciate it.