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LOT 3381
David White Company
Pendulum Astrolabe with
Case - Developed during World
War II and released in the later 1940s, the pendulum astrolabe was designed to use optical
sighting to determine the position and angle of stellar bodies, which in turn could be used
to calculate the physical location of the observer, and was a useful tool for military forces
and geological studies. Black enamel finished overall, with a pair of adjustable
eyepieces and lenses set at a fixed angle, a set of bubble levels, a
small onboard lamp for reading measurements, and a tripod mount
with integral level adjusters. Included with the lot is a “US” stenciled
hardwood case, six spare lamp bulbs and a tripod.
CONDITION: Very fine, with minor handling marks and wear. Optically and
mechanically untested.
Estimate: 1,800 - 2,500
LOT 3380
American Optometric Company Corneal Microscope/Slit Lamp
Device with Integral Stand - Established in the 1830s and active
well into the 20th century as an independent brand, the American
Optical Company was a major producer of civilian and military eyewear.
Constructed from steel and brass, the device bears an AO brand plate
on the base. A set of four slit lamps are arranged on a circular housing
attached to the scope, which can rotate approximately 90 degrees with
adjustments for height and distance. The headrest is also adjustable,
with hard rubber chinrest and a swiveling brass occluder.
CONDITION: Fine overall, with mild wear and handling. Optics appear
to show minor spotting, lamps untested.
Estimate: 1,500 - 2,500