A BELGIAN ORMOLU AND BLACK MARBLE COMPLICATED ASTRONOMICAL WORLD-TIME SKELETON CLOCK

A BELGIAN ORMOLU AND BLACK MARBLE COMPLICATED ASTRONOMICAL WORLD-TIME SKELETON CLOCK BY HUBERT SARTON, LIÈGE, CIRCA 1820 The ormolu bezel cast with sunbursts and foliate beading framing a white enamel Roman and Arabic chapter face signed Sarton above VI, finely pierced blued steel hour and minute hands, counterpoised sweep center seconds hand, central subsidiary calendar rings for date, day of week with corresponding deity and month with corresponding number of days all with blued steel serpentine arrow-head hands, the lunar dial displaying age and phase of moon flanked by the sun dial indicating the times of sunrise and sunset with corresponding shutters, the world-time dial above with static inner ring with 24-hour chapters calibrated VII to VI in gilt enamel and similarly in black thus indicating day and night hours, the outer revolving ring finely painted with 52 locations around the world, the movement with triangular plates and twin going barrels; the going train with pinwheel escapement and later brocot steel-suspension with grid-iron pendulum, strike train with outside counterwheel strike on bell above via hammer on vertically positioned arbor, the whole on tapering columns supported on a D-ended rectangular black marble plinth 23 1/8 in. (59 cm.) high, 12 1/8 in. (31 cm.) wide, 5 ¼ in. (13.5 cm.) deep