A year-going perpetual calendar and world time skeleton timepiece with chronometer escapement Second half 19th century The frame cut to a foliate design with six graduated pillars securing the plates with double-ended blued steel screws, the multiple barrels wound from the back culminating in a sub-assembly frame including the contrate wheel beneath the escapement platfrom with châton-jewelled endstone to the cut bi-metallic compensated balance with blued steel helical spring, Earnshaw-type spring detent escapement, the main dial of regulator format with blued steel hands and rectangular apertures for the day, date, month and year (beginning 89 and ending 13), the world time disc receiving indirect drive from the centre wheel and displaying the time for 71 different cites around the world; on moulded gilt-metal base and within an arched gilt-brass frame with bevelled glasses 18.3/8 ins. (46.5 cm) high
A year-going perpetual calendar and world time skeleton timepiece with chronometer escapement Second half 19th century The frame cut to a foliate design with six graduated pillars securing the plates with double-ended blued steel screws, the multiple barrels wound from the back culminating in a sub-assembly frame including the contrate wheel beneath the escapement platfrom with châton-jewelled endstone to the cut bi-metallic compensated balance with blued steel helical spring, Earnshaw-type spring detent escapement, the main dial of regulator format with blued steel hands and rectangular apertures for the day, date, month and year (beginning 89 and ending 13), the world time disc receiving indirect drive from the centre wheel and displaying the time for 71 different cites around the world; on moulded gilt-metal base and within an arched gilt-brass frame with bevelled glasses 18.3/8 ins. (46.5 cm) high
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
