1" long, made of turned bone with brass findings, this monocle-shaped lens houses a tasteful nude woman printed on a Stanhope. In the 1800s, a series of guys merged 18th-century optics and 19th-century microphotography. The resulting miniature lenses was hidden inside all kinds of regular objects: pens, pipes, needle cases, thimbles... but the way to keep a precious secret close at hand (literally) was to stash it in in a ring or fob like this one. Of course, naked women were wildly popular. This one is on the tasteful side - I've seen some FREAKS. She is topless at a desk, wearing a hat, holding a pen/quill. The casing is somewhat stained with a green patina, probably from metal.