Stirn L'Invisible

{"overview":"The Stirn L'Invisible is a late-19th-century concealed detective camera made in Germany, designed to be worn beneath a waistcoat with the lens protruding through a buttonhole to take circular dry-plate exposures. With just one verified hammer price on file, the wider value range in today's market cannot be reliably stated, and what a Stirn L'Invisible is worth in 2026 will depend heavily on completeness, condition, and which specific size variant is offered.","buying_guide":"As a wood, brass and leather instrument well over a century old, condition is the dominant value driver: inspect the body covering for splits, the brass fittings for corrosion, and the shutter mechanism for function.

Generated summary, 28 Apr 2026 — not checked by hand; prices on this page come from the sales, not from this text.