AO No27 VINTAGE Stereo Microscope-Dual Rack & Pinion Focusing & Glass Protector, US $2300 – Picture 0

AO No27 VINTAGE Stereo Microscope-Dual Rack & Pinion Focusing & Glass Protector, US $2300 – Picture 1

AO No27 VINTAGE Stereo Microscope-Dual Rack & Pinion Focusing & Glass Protector, US $2300 – Picture 2

AO No27 VINTAGE Stereo Microscope-Dual Rack & Pinion Focusing & Glass Protector, US $2300 – Picture 3

AO No27 VINTAGE Stereo Microscope-Dual Rack & Pinion Focusing & Glass Protector, US $2300 – Picture 4

AO No27 VINTAGE Stereo Microscope-Dual Rack & Pinion Focusing & Glass Protector, US $2300 – Picture 5

AO No27 VINTAGE Stereo Microscope-Dual Rack & Pinion Focusing & Glass Protector, US $2300 – Picture 6

Ao No27 Vintage Stereo Microscope-dual Rack & Pinion Focusing & Glass Protector

US $2300

Cochran, Georgia, United States
Jun 9th

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Vintage Black AO Model 27 Stereomicroscope with Dual Rack and Pinion Focusing and Protective Glass Slide The American Optical (AO) Company and the C. A. Spencer & Sons Company started as independent entities. AO began in 1833 as an eyeglasses manufacturer in Southbridge, Massachusetts. Charles A. Spencer began in the late 1930s as, perhaps, the earliest successful American microscope manufacturer, working initially out of Canastota, New York and after a number of moves out of Buffalo, New York. New York State was also the home of the Bausch and Lomb Optical Company. In 1935, AO bought the Spencer Lens Company, and after this purchase, many of their microscopes carried the AO Spencer designation, eventually changing to simply AO. Listed here is a Model 27. It has a fixed magnification with 10x AO eyepieces. The clips under the objective hold a protective glass cover, present here but often missing. The protective glass is chipped in one corner, see the photographs. The protective glass holder and some screws show some signs of rust. The clips are to hold the optional protective glass. They are not for holding slides, as they move with the focusing adjustment mechanism. Thus, they can be removed without any compromise in stereomicroscope functionality. However, they do provide historical context, and probably should be kept if this microscope is purchased for its important historical significance as well as its function. Condition of the instrument is perhaps somewhat better than its age might suggest. This stereomicroscope has two independent rack and pinion focusing mechanisms to allow for a significant height variation above the object under examination. It can be tilted anywhere between approximately 0 – 90 degrees (see photographs), thereby, allowing significant flexibility in the objects to be examined. This flexibility is also aided by the lack of a formal stage, the microscope opting instead for a solid base allowing it to be used in a variety of positions with a myriad of objects. This AO stereomicroscope was sold by W. M. Curtin & Co. whose ID plate is still affixed to the front of the instrument. The instrument is approximately 10 inches, as shown in some of the photographs, but as it has a significant variation in height this can be changed significantly. The two rack and pinon mechanisms work appropriately, as does the interocular spacing adjustment. To allow this stereomicroscope to be used tilted the base is quite heavy to provide stability. The instrument weighs approximately 9 pounds 10 ounces. This is an earlier model, as later Model 27s were manufactured in tones other than black. The photograph through the microscope shows a portion of a Mexican one peso note. -- © RJK 2014 Authorized __________ No need for concern about stock pictures not matching the item for sale. PHOTOGRAPHS OF THE ACTUAL ITEMS FOR SALE These pictures are part of this listing, and we hope they can answer most questions. However, please feel free to ask any questions you may need answered to make an informed decision. We will do our best to answer them. All items included in this sale are shown. __________ To help keep buyer costs as low as possible, we ship via economy shipping, which although less expensive takes longer. However, we recognize that some buyers would prefer to receive their package as quickly as possible. If this is you, we offer expedited shipping at cost. There is no cost for packing materials or handling. If you select this option, please let us know at auction close by sending an eBay message, Do not rely on a message sent through PayPal as these are not always seen. We try to ship items as quickly as possible. If you do not select expedited shipping, no worries we will mail your purchase out quickly via economy–mail. __________ We are proud of the 100% feedback and over 1,400 transactions we've had on eBay over the past 15 years. We would like you to be as pleased with your purchase. If for any reason you are not 100% satisfied, please let us know. __________ You will never feel the need to open a case, or leave Neutral or Negative Feedback. If any issue should arise, we will work to fix your problem quickly and satisfactorily.