There are two lines on the bottom that I believe were made at the manufactures'. Doris and Ralph.
Vintage MCM Fenton Ruffled Hobnail Blue Crimped Top Small Favor Vase GLOWS!!!
Beranek Czech Art Glass Vase Blue Polished Bottom Clear Ruffled Top 6" tall
Vtg Ruffled Vase Handkerchief Style Hand Blown Glass Blue & White W/ Bubbles 7”
BEAUTIFUL Vintage Ruffled Top Blue Crackle Glass Vase 9" Exc
Vintage Fenton 11" Periwinkle Blue Spiral Optic Overlay Ruffled Vase 11" 1980s