Daum Art Nouveau Vase With Wheat's Ears Decor

Unusual shape and decor for this vase from the Daum factory.
Made of cased glass, one layer transparent over one speckled green, the decor engraved by acid etching in transparent brilliant relief on a green frosted background.
The decor of this tapered vase being visible on the transparent outer layer thus remains discreet, revealing itself fully in the light.
Pioneering work of the use after 1918 of the acid engraving technique, renewed to not only release the successive layers of glass but also to create decorations in high relief and "play with the material by obtaining dullness, icings which oppose and combine with the transparency of the glass" (Réunion des musées nationaux, "Daum, collection du musée des Beaux-Arts de Nancy", p. 205).
"Daum Nancy" signature with detached cross of Lorraine in slight relief near the neck.
c. 1910