"By appointment to the King, The Goldsmith & Silversmith Co., LTD, 112 Regent Street, London" is the embossment on the case, which we think is the old original, though perhaps not since that company only began business in 1880 and these are more likely Georgian, mid-1700s to perhaps c.1880s, so possibly. A "quizzing glass" was a single magnifying lens on a handle which was held up before the eye to enable closer scrutiny of the object in view. Typically worn on a long gold chain so easily at the ready, I've noted one with turquoise settings and about this same size for sale just today at over $12k on a site which continues to ask us to sell through the site. We prefer our own site, and you good customers - and reasonable prices. Measurements noted on the photos. The final photo shows other similar ones, and also portrait miniature in the era they were popular and how they were worn. RARE! So lovely as jewelry, and for up close inspections of maker marks and, say, portrait miniatures. Are you deciding which of your long gold chains it will look more beautiful with?
Very good to excellent condition throughout, no damage to the gold and no loss or damage to the magnifying glass. Relatively light magnification, perhaps a 2+. These are rare, and are museum pieces. This one from my own collection I have owned for decades. One hardly ever sees them now other than in museums. Box is very nice, and very very slightly warped to where the clasp will catch, but not hold closed. It is the exact way I bought it many years ago.
