Pair of Williams, Brown & Earle Mother Of Pearl Opera Glasses

Beautiful pair of opera glasses made by Williams, Brown & Earle of Philadelphia. This firm was well regarded as selling high end optical equipment in the late 19th Century and the very early part of the 20th century.  Glasses operate smoothly.  They do show wear from age and use, so please review the photos.  The dark color of mother of pearl is highly unusual.