Antique satin custard Veritable Opal Wirths h/p vase

A magnificent little vase made of satin custard. All hand painted with little purple flowers and leaves. Measures just 3" tall with a lightly gathered style top. Perfect condition. Stamped on the bottom in gold, Veritable Opal Wirths, and a large 4. THis has been in the family as far as can be remembered early 1900's. Perfect condition. I personally know nothing about this marking. A wonderful old piece of collectible glassware.