Daum Peacock Feather vases are special as the two blue colors of the feather centers were applied with molten glass, a technique called padding. They were then pressed into the glass on a table called a marver. It's similar to the marquetry technique in glass. It was a difficult technique, so you know the quality is very high. And what's more Art Nouveau than peacock feathers?  This is a wonderful example.  Nice big size at 11¾" tall.  Signed.  Mint condition.