Compendium fashioned as a quadrant-shaped diptych with hinge along the curved limb. Altitude quadrant and lunar vovelle on first leaf. Horizontal dial with hinged gnomon for three latitudes and horary quadrant on second leaf. Labeled in Latin. In 18th-century wooden case with shagreen leather, velvet, and brass.
Matériel
"CHRISTOPHORVS/SCHISLER ME FECIT/AVGVSTE ANNO/DOMINI 15•56" on side edges of second leaf.;
