Viewer, of nickelled brass
1880-1920
Collection of parts which is possibly a viewer
1801-1900
Simple viewer in leather case
1900-1920
Simple viewer, Continental, mid 19th century
1830-1870
Viewer, thick lens set in cork
1871-1900
Viewer, thick lens set in cork
1871-1900
Magnifier with sixteen cells for samples
1700-1750
Viewer, thick,lens set in cork
1871-1900
Simple viewer of geological samples in alabaster egg shaped container
1840-1850
Simple viewer, ivory, English, early 19th century
1800-1830
Simple viewer on handle, 1851-1875
1851-1875
Simple viewer
1871-1900
Viewer, with lens set in body tube having inner glass tube and two plane discs holding ants eggs
1831-1870
Simple viewer, English, 19th century
1801-1900
Simple viewer on handle
1800-1850
Simple viewer
1701-1800
Simple viewer in lignum vitae and ivory
1801-1830
Simple viewer in fishskin case
1770-1800
Simple viewer in case, English, early 19th century
1801-1830
Simple viewer, origin uncertain, 19th century
1801-1900
Alabaster jar as simple viewer
1840-1850
Viewer with lens set at top of tube
1831-1870
Simple viewer
1840-1860
Simple viewer
1851-1900
Simple viewer, walnut, German, early 19th century
1800-1850
Simple viewer with facetted condenser lens
1830-1870
Simple viewer
1831-1870
Simple viewer with boxwood cylinder
1830-1870
Viewer, consisting of two glass discs to hold specimen
1801-1850
Simple viewer (base missing) in case
1800-1830
Simple viewer, English, mid 19th century
1840-1860
Simple viewer, cased, English, 1800-1850
1801-1850
Two lens viewer with watchglass
1880-1900
Simple viewer, English, 19th century
1801-1900
Simple viewer with lignum vitae case and stand
1801-1850
Simple viewer in case, English, early 19th century
1800-1825
Simple viewer
1880-1920
Viewer formed from two convex lenses with aperture disc between them
Magnifier with 16 cells, Dutch, 18th century
1701-1800
Simple hand microscope with object disc of six windows
1830-1870
Eyepiece and part of body tube from microscope
1801-1900
Viewer with spring cylinder to hold preparations
1880-1920
Viewer, in two parts
1865-1875
Simple viewer
1830-1870
Simple viewer, in case, English, mid 19th century
1830-1870
Micrograph, 1851-1862
1851-1862
Simple viewer
1831-1870
Simple viewer, English, mid 19th century
1831-1870
Viewer with facetted window
1850-1870