Early 20th century, on a circular composite base having a cannon, a magnifying glass in brass frame, a dial, and a gnomon. Such instruments can be calibrated so that the magnifying glass ignites a primed cannon at a specified time.

6-1/2 x 12-1/2 x 9-1/2 in.

Private Collection of an Antiquarian, Charlotte, North Carolina

Nice patina to brass; the glass with residues; wear to dial; good estate condition.