An 18th century continental Calendarium Perpetuum, (perpetua...

An 18th century continental Calendarium Perpetuum, (perpetual Calendar) with obverse and reverse volvelles having apertures for sunrise, sunset, days of month, day length, night length, months length, possibly German for the English market Monday spelt 'Munday', later replacement screw to the centre.

Stima:€358.17

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