Original vintage optical trade magazine ad for THE BROWN INSTRUMENT COMPANY. Main office and factory was located in Philadelphia, PA. Automatically Control Your Temperatures to Within 10 degrees. Brown Long Distance Indicating and Recording Thermometers and Pyrometers. Old 1923 optical laboratory instruments advertisement.
brown instrument company 1923 automatic temperature control vintage ad
- Product Code: s271
- Length: 9 inches
- Width: 6 inches
- Pages: 1
- Views: 34
- Availability: In Stock
- $20.00
$15.00
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