Small timepiece movement with helical gearing (incomplete) Small timepiece movement with helical gearing
Japanese pillar timepiece. Hour indicator and two hour-marks and wheel missing. Japanese pillar timepiece
Spring-driven fusee timepiece movement with dovetail lever escapement. "VULLIAMY. LONDON. No.1593. A.D.1843" engraved on backplate Spring-driven fusee timepiece movement with doveta 1843
Atmospheric clock, Mercury, unsigned, 1850-1900. The time is shown by a bead of mercury falling down a sealed plugged glass tube under gravity. The use of mercury in timekeeping has several different patents. Mercury Atmospheric Clock, 1850-1900 1850-1900