Fenton produced a color that was only sold to Sherwin Williams and was only made for the years of 1943 and 1944. That color, Wisteria Opalescent, was made in a wide array of Hobnail pieces. Wisteria Opalescent glass is purple with a slight red case similar to Plum Opalescent. This 4 1/2" vase has a triangular crimped top. The opalescent is very heavy around the top and all hobs are perfect with no issues anywhere. It is in mint condition.