Case: bi-color 18k yellow and white gold with marine blue enamel decoration
Dial: silvered dial with text A L'Emeraude Lausanne
Movement: caliber 17 ligne, 18 jewels, Ebauche design by Henri Hofer (deposited April 29, 1926), finished in all probability by Niton or Piaget for Niton for A L'Emeraude.
Provenance:
1928 - Niton, Geneve (in all probability, or Piaget)