Original vintage optical trade magazine ad for THE BROWN INSTRUMENT COMPANY. Main office and factory was located in Philadelphia, PA. Resistance Thermometer give one fifth degree readings at low temperature ranges and at a distance of 2500 feet. Old 1923 optical laboratory instrument advertisement.
brown instrument company 1923 resistance thermometer temps vintage ad
- Product Code: s270
- Length: 9 inches
- Width: 6 inches
- Pages: 1
- Views: 54
- Availability: In Stock
- $20.00
$15.00
ON SALE
25% OFF
You save: $5.00 (25%)
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