Lot Essay
THE GLORIA WAS MADE BY A CONSORTIUM OF THE BILLON-HALLER, AMI RIVENC AND LANGDORFF BUSINESSES. THE BILLON HALLER BUTTERFLY TRADE MARK APPEARS ON THE ZINC DISCS, WHICH ROTATE ANTI-CLOCKWISE AND HAVE TWO-PIECE PROJECTIONS COMBINING THE POLYPHON AND SYMPHONION DESIGNS IN ONE. WINDING IS ALSO ANTI-CLOCKWISE.