The pivoted detent escapement with ruby pallets and impulse stone with uncut bimetalic balance, flat blued steel hairspring, mounted in a thre-armed carriage rotating once in three minutes, with chased and engraved two pillar central support with spring drive mounted between two brass plates, under glass dome and mounted on black lacquered wooden base, signed.
105mm. diam. movement

£8,000-10,000
US$13,000-16,000