AN IVORY DIPTYCH SUNDIAL, FROM THE KARNER WORKSHOP, CIRCA 1720, face Ia with lunar dial divided 1-29 and 1-12-1-12, face Ib with vertical dial divided I-VI-VI-XII and stamped half-sun face, face IIa with horzintal dial divided 4-12-8 and three stamped snowflakes, the compass with iron needle and original glass with retaining ring (lacks lunar vovelle)--2¾in. (6.4cm.)