I have seen the exact shape in Tiffany glass. Nash was the foreman at Tiffany Studios and took over the company for a few years and produced similar wares under his name. Signed: G D 78 NASH.Dimensions: 8" tall by 5" across the top. SEE MY OTHER LISTINGS USUALLY A NICE ASSORTMENT OF ART GLASS. The item "Signed Nash Iridescent Art Nouveau Glass Vase Tiffany Studios Favrile No Reserve" is in sale since Tuesday, September 21, 2021. This item is in the category "Pottery & Glass\Glass\Art Glass\North American\Tiffany". The seller is "glasser" and is located in Washington, District Of Columbia. This item can be shipped worldwide.