planispheric astrolabic clock display the british museum london england

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Planispheric astrolabic clock on display at the British Museum in London England Royalty Free Stock Photo

Planispheric astrolabic clock dated 1560 on display at the British Museum in London England Royalty Free Stock Photo

Planispheric astrolabic clock on display at the British Museum in London England

Planispheric astrolabic clock, verge escapement with balance. moon globe, half black and half white, rotates about an axis and shows its phase visually; ivory topped pin passes through a slot and engages with groove in ecliptical circle of the rete, showing position of sun in ecliptical; moon`s age and position also recorded; reverse: manually operated calendar dial with months in French and date.