astronomical compendium knife, Switzerland (1606)
Astronomical compendium; in form of knife: steel blade, ivory handle; hinged steel side-plates and end-cap; four plates are engraved with deities on outside and have calendars on inside; outer end of third plate: hinged silver box with volvelle inside; signature engraved on rotating disc; ivory handle has shallow carvings including Adam and Eve and the Crucifixion; box engraved with date and engraved scenes; inside: miniature equinoctial dial.










