Historical Pince-Nez Eyeglasses Diagram - 19th-Century Optical Design #2047721 (License: Personal Use)

This black-and-white technical drawing illustrates a late 19th-century pince-nez eyeglass assembly, with numbered components indicating critical structural elements: oval lenses (1), a curved metal bridge (2), temple arms (3), flexible hinges (4), adjustable nose pads (5), and securing screws or rivets (6). The fine cross-hatching and precise linework suggest it was originally published in an optical instrument manual or patent documentation. Such diagrams were essential for manufacturing, repair, and professional training before modern standardized frames.

Used on museum exhibit pages, optical history blogs, antique eyewear collector sites, or academic resources about vision correction evolution; matches user intent to research vintage spectacle mechanics or identify parts for restoration.