Small mahogany reflex camera obscura with sliding-box focus, c.1800 Reflex Camera Obscura With Sliding-box Focus circa 1800
Four folding artist's viewers in horn frame, each with a claude glass and mirror by Carpenter and Wesley, 24 Regents Street, London, England, 1875-1900 (B. 1643, B1648, B1647, B1635). Folding artist's viewer with claude glass and mirror. 1875-1900