Shell mounted in section H 7 x W 21 cm

Shell mounted in section
H 7 x W 21 cm
Joint: a metal and tortoiseshell mail holder (One tortoiseshell plate detached )
H 14 x W 11.5 x D 7 cm
provenance: Hélène Rochas Collection, Christie's Paris, 27 September 2012, lot 79 and 167