Carlo Ponti Mid 19th century (ca) "Pontioscopio" stereographoscope.
Stereoscope viewer Internet - Original source ill-defined Freeman's - Hindman, Nov 15, 2021, Sale 960 - American Historical Ephemera & Photography, Lot 569
Manufactured by Carlo Ponti, Venice, Italy.
Ornately carved, collabsible wooden stereographoscope, 22 x 10 x 5 in. (when folded), with magnification lens with 8 in. diameter. Beneath the large lens is a stereoscopic viewer, inscribed on the front “Pontioscopio." With a sliding card holder in the shape of a height adjustable easel
