~ Cadran solaire diptyque rectangulaire en ivoire à fil-axe la table verti

~ Rectangular ivory diptych sundial with wire axis, the vertical table engraved with a compass rose with blowing putti, the interior signed "Pafper Milner" and engraved with the signs of the zodiac, the horizontal table animated with a compass, the reverse side presenting a perpetual calendar with a gilded brass wheel
Germany, 17th century 10.5 x 6.5 x 1 cm