15ct gold Regency quizzing glass with a double serpent motif finely engraved with crosshatching c.1820.
Traditionally worn on a long chain to ‘quizz’, to closer inspect the object at hand.
A ‘quizzer’ magnifying lens encircled by gold became the ultimate connoisseur’s accessory.
A most fashionable item for the Regency dandy. 
2.8inches by 1.5inches.