<p>Original 1943 electrical trade vintage ad for<b><span style="font-size: 14px;"> OHMITE MANUFACTURING COMPANY. </span></b>Main office and plant was located at 4801 Flournoy Street, Chicago, IL</p><p> Manufacturers of Rheostats and Resistors. </p><p>Ohmite Rheostats and Resistors Used in Electron Microscope. </p><p>This amazing electron microscope, developed by RCA Laboratories, explores new sub-microscopic worlds not revealed by light waves. It is from 50 to 100 times more powerful than the strongest optical microscope. Magnification up to 100,000 diameters are obtainable.</p><p>Unbound from a 1943 electrical engineering magazine, this unique old one-page advertisement would display beautifully matted and framed. Nice graphics. World War 2 propaganda. A fabulous addition to your retro electrical library.<br></p>
- SKU zl501
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