Although there is no signature on this lovely little vase, I have been told - hanks to my friends at The Art Glass Discussion Group on Facebook - that this art glass bulbous bottom vase made by Loetz. And it definitely dates to the art nouveau era - c. 1900. The slithery, opalescent lizard green color, with rainbow pearly colors on the bottom, is absolutely mesmerizing. Measures just under 4", and is in excellent condition. There are microscopic flea bites on the rim, but no visible damage anywhere.