Art Deco Risque Stanhope Nude Lady Peepshow Ring

British instrument maker and inventor John B. Dancer is considered the father of microphotography. In 1852, he discovered by affixing a reversed microscope lens to a camera, he was able to produce a full-size picture occupying only 1/16th of an inch.  Often capturing larger subjects, such as paintings or landscapes, he would then expose the image onto a wet-plate creating a microscopic photo.  However, once French photographer and inventor René Dagron caught wind of Dancer's work, he decided to take the microscopic image to a new level.  Unhappy with having to use a microscope to see Dancer's micro-pictures Dagron invented a simple, lightweight modified Stanhope lens to easily view them.  He began using his micro images and modified lens in small novelty items and jewelry.  In 1862, he took his novelty Stanhope viewers to London and presented them to Queen Victoria.  During the 1870-1871 Franco-Prussian War, Dagron used his microfilming process to carry thousands of messages and even n