A rectangular silver and gold cigarette case by Chaumet

A rectangular silver and gold cigarette case by Chaumet, with engine turned and linear engraved decoration, the thumbpiece set with four calibre-cut rubies (probably synthetic), signed 'Chaumet Paris', stamped 'Or/Argent' for silver and yellow gold, oval poincon for mixed metals, maker's lozenge, 9.5cm longest, 155.8g