Details
Wide-angle lenses
Harrison & Schnitzer, New York; brass bound, wheel-stops, and marked Patented June 17 1862 (2)
Harrison & Schnitzer, New York; brass bound, wheel-stops, and marked Patented June 17 1862 (2)
Literature
Rudolf Kingslake (1989), A History of the Photographic Lens, p. 52-53.