Watson Barnet Greenough Stereo Microscope, Base Allows For Large Objects

US $350

Cochran, Georgia, United States
Jun 3rd

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Grey Watson Barnet, Greenough-Style Stereomicroscope (stereo microscope) with 10x Eyepieces and interchangeable Objective Lenses Objectives present: 2.5x, 10x It is supplied, as are all Greenough stereomicroscopes, with dual porro prisms. This Greenough microscope is named after its American inventor Horatio Saltonstall Greenough. This style stereomicroscope was first built by the German Company Carl Zeiss, following a meeting between Mr. Greenough and Dr. Ernst Abbe of Carl Zeiss . The microscope, with its two interchangeable dual objectives, weighs approximately 6 pounds 5.8 ounces, and is approximately 10-1/2 inches tall, as shown. It has a weighted base which at widest point is approximately 4-3/4 inches. The base allows for taller irregular objects to be examined without having to place them on a stage. The stereomicroscope has paired Watson 10x eyepieces. The last picture is the detail, seen through this microscope using the 2.5x objective, of a portion of a Mexican cinco pesos (5 pesos) bill. Please note that although 10x dual objective goes on easily and works, sliding attachment on this objective does not move all the way to full closure by hand. Although for use it can be inserted and partly locked by hand, full locking may require use of a screwdriver or other tool. One eyepiece lens allows independent adjustment of focus, to accommodate for differences in visual acuity between left and right eyes . ______________________________ The London Manufacurer: Watson Barnet (Watson Barnet is now a subsidiary of Pye Instruments Group, which is majority owned by Philips) William Watson founded his company in c. 1837 at City Road, Clerkenwell, London. However, according to Bracegirdle (Bracegirdle, 1996), the first Watson microscope was not made until 1876, at which time the company was known as W. Watson & Son, and located at 313 High Holborn, London. The name was later changed to W. Watson and Sons, after a second son became part of the company. The company was still located at the 313 High Holborn address. William Watson died in 1881 and the last Watson microscope was made c. 1970. The company initially gained renown with their non-stereomicroscopes, the well-made Van Heurck models, with two rack and pinion mechanisms allowing English or Continental length microscope tubes to be used. These instruments were based on the designs, and named for, the famed Belgian microscopist Henri Van Heurck . -- © 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 1,300 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.