This is a wonderful vintage display piece It is a horizontally mounted Greenough type stereo microscope mounted on a large and elegant pillar stand. There is a rack & pinion drive at the top of the pillar with which the height of the instrument may be altered through a range of about 40mm. The carrier post is triangular in cross-section. On top of the triangular pillar is a rotating joint that carries another rack & pinion drive for focusing the microscope. The rotation is clamped using a small knurled screw tucked away underneath the larger focusing drive knobs (see third photo).
The microscope itself is relatively compact, but carries a revolving nosepiece on which two objectives may be mounted. Both objectives are numbered to match the serial number of the microscope, so they were probably matched to the instrument at the factory. A pair of wide field 10x oculars is included that appear to be original. The alignment of the objectives is very good, however one of the objective pairs does exhibit some delamination in one of the elements. It will still image, however. I did not see the magnification engraved on the objective pairs.
Cosmetically, the instrument is in spectacular condition – the chrome plated knurled knobs are pristine and completely free of dirt or grime There are a very few small chips in the black lacquer of the pillar base. The only other thing I noted was the rotating bearing for the microscope body appears to have been bored slightly off-axis, so the microscope does tilt ever so slightly to the side. This is definitely a factory ‘error’, as there is no wear or any sign of damage anywhere on the instrument.
I am uncertain as to the function of the instrument, but it may have been part of an optometry station, perhaps for use with a slit lamp illuminator.
Location Display 7-3
Photo set 463
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