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American Optical is a world-renowned microscope manufacturer, stemming from Charles Spencer’s groundbreaking optical design. American Optical microscopes hit the market in 1938 with an ad describing it as a reliable scientific instrument. As the microscopes grew in popularity, American Optical purchased the Spencer Lens Company. Today, American Optical produces reliable high-quality microscopes and test equipment that are elegant in design and have withstood the test of time. Spencer’s original microscope design has not changed drastically except to improve the lenses. Leica acquired American Optical and continues to manufacture educational and scientific microscopes. Purchase lightly used, refurbished American Optical microscopes from ValueTronics.com.