Original vintage optical trade magazine ad for BROWN INSTRUMENT COMPANY. Main office and factory was located in Philadelphia, PA. A Portable Pyrometer of Extreme Precision.Ideal for Checking Millivoltmeters and Potentiometers. Old 1922 optical industry equipment advertisement.
brown instrument company 1922 portable pyrometer precision vintage ad
- Product Code: s224
- Length: 9 inches
- Width: 6 inches
- Pages: 1
- Views: 28
- Availability: In Stock
- $20.00
$15.00
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