A diamond lorgnette, early 20th century

A diamond lorgnette, early 20th century, the lorgnette of foliate openwork design, set with circular-cut diamonds and glass lenses, opening via a spring mechanism, suspended from a platinum chain interspersed with spectacle-set circular-cut diamonds and floral links, lorgnette length 9.2cm, stamped Pat. Applied For, numbered 40023, chain length 93cm