Spencer Microscope Dating

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Dating Spencer Microscopes - Spencer Microscope
Investigating the Origins of a Spencer Monocular Microscope
SPENCER No 1 MICROSCOPE
Microscope | National Museum of American History
AO Spencer Microscope (Serial #: 139,466) : whatsthisworth
Spencer 60h Portable Microscope
Spencer Microscope Serial Numbers - progsfam
Spencer Microscope Serial Numbers - personalinternet
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Was the Spencer microscope manufactured after 1897, when the mechanical stage "c" mount was available? Or, was the Spencer microscope manufactured before 1897? The microscope's owner may have replaced the original stage clips with the mechanical stage "c" mount after its purchase . A precise date of manufacture has yet to be determined .
Spencer was the first to patent this type of mechanism in the United states . The patent for the substage can be seen here . But the substage was not the only Spencer patent applicable to this microscope . On the same date a patent for the focusing mechanism, the second for a focusing mechanism by Spencer in just two years .
The serial number indicates a date of 1918 . The Spencer Lens Co . boasted in 1920 that the No . 44 was "the most popular of all Spencer Microscopes . Thousands are now in daily use in medical and general laboratories, also by physicians ." In 1930, the No . 44 was "the most popular of all Spencer microscopes for routine work in the laboratory . . .
AO Spencer Microscope (Serial #: 139,466) I was able to get my hands on an older AO Spencer microscope . The serial number is 139,446, which based on some research puts the production date of this particular microscope between 1934-1937 . Most likely closer to 1937, based on the serial number being so close to the next production tier (140,000) .
microscope-antiques .com › spencer60H .html
DESCRIPTION: This heavy, but highly compact microscope , is signed on the tube 'Spencer Buffalo U .S .A .' in an insignia and has below this the serial number, 46937 . It is also signed on the triple nose piece 'Spencer Lens Co' and on the attachable graduated mechanical stage signed 'Spencer Buffalo U .S .A .' .
progsfam .weebly .com › blog › spencer-microscope-serial-numbers
Spencer - Microscope Maker Charles A . Spencer is known as America's first microscope maker . He was born in 1813, in Madison county, NY, in what would later become Canastota . In 1838, he had an ad printed, announcing . Serial Numbers: 31663-20330-43465-53102-90500 87105-58253-43695-75947-22835 . It is not for everyone, though, namely because of . . .
personalinternet .weebly .com › blog › spencer-microscope-serial-numbers
Spencer microscope serial numbers . A serial number, 8 . It has a HSTC number of 2 . The mechanical stage is a later addition, probably installed . American Optical Spencer Microscope , Three Objectives, Mechanical Stage, Light List Price . Whether you need to find a certain stereo microscope for your lab or classroom, seek repair work for a damaged . . .
www .antique-microscopes .com › siteindex .html
Site Index for www .antique- microscopes .com . The list of microscopes presented below is organized with respect to the country of origin and further with respect to the instrument maker . Use the drop-down menu link above to choose the country of origin . In dating the instruments presented on this website, use was made of whatever information . . .
A Bausch & Lomb 1898 Model BB recently sold for just over $2,000 and other models sell as high as $10,000 . Several Leitz microscopes from the 1920's range from $500 to $800; however, eBay vendors have sold a few Leitz models from the late 19th century for less than $200 . The beauty of an antique microscope is manifested in myriad ways .
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Spencer Microscope Dating