Introducing a Fenton Blue Opalescent Hobnail Flower Vase The Fenton Art Glass Company was an American manufacturer that produced handmade art glass from 1905 to 2011. The "Hobnail" series features a design motif inspired by rivets and has collectors worldwide. "Opalescent glass" is a translucent glass made by mixing specific compounds into the glass raw materials and reheating them, which emits a faint iridescence when light passes through it. As shown in image 13, this is not damage but was created during the manufacturing process. There are no noticeable stains or damage, but as this is a very old product, please understand that it is a vintage item before purchasing. Bottom base Φ7.7cm, ruffle width 13.5cm, height 14cm