A French Noon-Day Gun
Comprising stout brass cannon barrel with two bands behind the moulded muzzle, moulded breech with knob-shaped cascabel, and plain trunnions, on brass mounts each with trunnion-cap with knurled securing screw, and adjustable brass-mounted circular magnifying glass acting against a D-shaped mount on each side, on a circular white marble base incised 'L'Ingr. Chevalier Opticien Du Roi A Paris' above an hour scale in Roman numerals from 'I' to 'XII', and with brass gnomon
27 cm. diam. base