Monocular opera glasses (Galilean type) with ivory covered gilded brass tube
1850-1910
Prospect glass
1794-1823
Spyglass by Edward Nairne, 1749-1775
1749-1775
small telescope (prospect glass; spyglass; opera glass)
1759
Prospect glass
1800-1810
silver-plated single-draw brass prospect glass with painted decorations showing classical figures
prospect glass (or spyglass) by J. Dollond & Son
1751-1775
Opera Glass by George Adams, London, 1750-1795
1750-1795
Achromatic prospect glass telescope
1795-1805
Ivory draw tube opera glass telescope
1834-1837
Non-achromatic prospect glass telescope
1774-1793
Achromatic prospect glass telescope
1809-1842
Achromatic prospect glass telescope
1795-1805
Prospect glass (spyglass)
1725-1735
miniature prospect or spyglass (Galilean)
1675-1685
single opera glass (prospect glass; spy glass)
1745-1755
Small prospect glass (or opera or spyglass)
1745-1755
Spyglass Covered with Green Shagreen, 1751-1775
1751-1775
Non-achomatic prospect glass telescope
1790-1829
Achromatic prospect glass telescope
1794-1823
Single opera glass, ivory body covered with turned decoration
1822
Spyglass (prospect glass), one draw tube
1725-1735
Opera glass telescope
1838-1862
prospect glass (spyglass)
1701-1800
novelty spyglass (prospect glass?), 2-draw tube, i
1701-1800
prospect glass (spyglass; opera glass)
1745-1755
Single Opera Glass by Chevalier
1800-1848
Prospect glass
1701-1800
spyglass (prospect glass)
1725-1735
Spyglass, 1765
1751-1775
Prospect glass (or opera or spyglass)
1745-1755
Six-draw single gilt opera glass
1820
Opera Glass, 1775-1800
Prospect spyglass telescope with shagreen tube and horn or darkened ivory lens mounts
1745-1755
Black ivory single opera glass
1790-1890
Folding single opera glass, silver
Spyglass by Jesse Ramsden, 1776-1800
1776-1800
Opera glass telescope with gilded brass tube and ivory body
1820-1840
Opera glass, one draw tube
1725-1735
Prospect glass (spyglass) telescope with silver-plated metal body
1730-1780
prospect glass (spyglass)
1725-1735
Miniature folding opera glass telescope
1800-1899
Folding single opera glass with case
1830-1870
Spyglass telescope with shagreen and leather tube.
1752-1761
Miniature folding opera glass (Galilean type)
1800-1850
opera glass telescope in case
1838-1854
1-draw prospect glass
Opera glass telescope with gilded brass tube and leather case
1820-1840
Miniature folding opera glass in case
1800-1850
Single Opera Glass by Chevalier
1800-1848