Delicate pâte de verre vide-poche by Amalric Walter and Henri Bergé, Nancy, circa 1920. Cast in polychrome glass depicting a finely modelled green butterfly resting on an amber ground. Signed AWalter/Nancy and Bergé. Dimensions 2 × 16 × 16.5 cm.
A similar model is published in François Le Tacon & Jean Hurstel, Amalric Walter: Maître de la pâte de verre, Éditions Serpenoise, Metz, 2013, p. 82.