OPTICAL

Three late Georgian gilt-metal quizzing glasses, one with higher-power magnifiying lenticle within the main lens, (left to right), 77mm , 73mm and 72mm high, respectively

A small early 19th-century ivory monocular spy-glass, 38mm high, in red morocco pocket case

An early 19th-century ivory single-draw monocular spy-glass, 68mm high, (closed)

Two views of an early Victorian single-draw monocular spy- or opera-glass, veneered in abalone shell, with gilt-metal beaded mounts, 67mm high, (closed)

A fine George III oval silver and tortoiseshell magifying glass, the bezel reeded, the cover with foliate mounts, 80mm high

A similar magnifier with mother-of-pearl cover, 68mm high

An extremely rare pair of George I steel spectacles, circa 1720, with round lenses, straight nasal bar and very long side pieces with rings for tying behind the head, 235mm long (folded)

A pair of late George III steel-framed spectacles with green lenses, with folding ear pieces and loop ends

A pair of late George III tortoiseshell-framed spectacles with sliding steel ear pieces

A pair of late George III silver-framed spectacles with sliding ear pieces

A pair of late George III brass-framed spectacles with sliding ear pieces

A pair of clip-on sunglasses, circa 1900

A pair of Victorian pince-nez spectacles, with a black papier-mâché case, gilt-enriched

A pair of Victorian lightweight steel spectacles, with a black papier-mâché case, gilt-enriched

A pair of George IV silver-framed spectacles, hallmarked London, 1826, maker's mark EC (incuse), in a contemporary silver-mounted tortoiseshell spectacle case, 129mm long