Round compendium with suspension ring and 3 leaves. Lunar vovelle on first leaf. Horizontal dial with hinged gnomon for latitude 48° on second leaf. Needle, type 16. Compass on third leaf. Possibly regilded. Labeled in Latin.
Материал
"CHRISTOPHORVS SCHISSLER SENIOR GEOMETRI. AC ASTRONOMI. ARTI:FA:15.98" around circumference of leaf 3.
