<div class="description">
American Optical Corporation Sixty student model monocular microscope features American Optical Spencer objective lenses. American Optical Corporation was a successor to the Spencer Lens Company, founded by Charles Spencer who strove to perfect the microscope and optical lens. During World War II, American Optical Corporation designed optics for the military, including sunglasses, gun sights and precision optics for industrial and military applications.</div>
1955 – 1960
This file was contributed to Wikimedia Commons by <a href="https://en.wikipedia.org/wiki/en:Science_History_Institute" class="extiw" title="w:en:Science History Institute"><span title="library, museum, and archive in Philadelphia, United States">Science History Institute</span></a> as part of a cooperation project. The donation was facilitated by the <a href="https://en.wikipedia.org/wiki/Digital_Public_Library_of_America" class="extiw" title="w:Digital Public Library of America">Digital Public Library of America</a>, via its partner PA Digital.<span style="text-align:left">
<ul><li><a rel="nofollow" class="external text" href="https://digital.sciencehistory.org/works/4lnojhu">Record in source catalog</a></li>
<li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/0f4b7bed6c52eff98f1df8b8c359df21">0f4b7bed6c52eff98f1df8b8c359df21</a></li>
<li>Science History Institute identifier: padig:SHI-4lnojhu</li></ul></span>