An early 20th century diamond-set quizzing glass by Cartier

An early 20th century diamond-set quizzing glass by Cartier, millegrain set overall to the platinum frame and stem. Double semi stirrup form suspension ring further set with diamonds and suspended from a fine link platinum chain. Signed Cartier and numbered 3117191 to the terminal. 9.5cm long, the chain 62cm. Cased by Cartier.