Bought on chance from eBay and the piece turned out be much lovelier than I had imagined. High quality glass and what looks like high quality engraving. The large circles are lenses cut into the vase and then polished. The smaller circles are also lenses cut into the glass but with a matte finish. The glass is fairly thin, it's 20.7 cm high and 4.8 cm wide at the mouth. I assumed that that the acid etched "Made in Czecho-Slovakia" made it pre WWII, but I'm out of my depth here. All suggestions greatefully received.