Description: Gilt brass, full plate, front wound, verge fusee movement. Small Egyptian pillars. Retaining main pinion, and verge escapement. Would have had a big eared, highly decorated cock and a silver regulator dial of almost the same size as the cock.
Additional Info:
The Deonna family was quite reputed in Geneva for high quality watches in highly decorated cases especially towards the middle of the 18th century.
The manufacturing style is exactly as the one during the French Regency Period. Swiss watchmakers started at the beginning of the 18th century to provide raw movements (ébauches) for French watchmakers. Towards the end of the century more an more French raw movement providers emerged such as Frédéric Japy. Latter started towards 1775 and by 1780 he had a steam engine speeding up production. From the initially 40’000 ébauches in 1777 his workshop produced 300’000 units in 1813 and 640’000 in 1861, more than the whole ébauche production (515’000) in Switzerland in 1861. For the production of watch parts and movements French and Swiss workshops worked together very closely. Some French ébauche providers bought them in Switzerland and acted solely as middlemen and distributors.
Antiquarian Horology 
