Puckerings has dated this piece to the 1880s.

The wheel which adjusts the focus and the two eye pieces are made from sought-after iridescent Mother of Pearl shell.
Stunning in every sense, the enamel decoration perfect, the mother of pearl without damage and the optics just as good. Measuring 4 1/4" wide x 2 1/2" tall extending to 3 1/2". Complete with original leather case.
Item ID: 31643
FREE Worldwide Registered Airmail; Insurance Optional.
Puckerings has dated this piece to the 1880s.
A quality online collection of fine english antique smalls with free worldwide shipping from london, england
You can view the stock and full dealer information on the Puckerings Profile Page