Original vintage optical industry trade magazine ad for THE BROWN INSTRUMENT COMPANY of Philadelphia, PA. What's Under the Hood of Brown Pyrometers. The Movable Element with13 parts and 43 operations. Old 1922 optical industry advertisement.
brown instrument company 1922 whats under the hood vintage ad
- Product Code: s225
- Length: 9 inches
- Width: 6 inches
- Pages: 1
- Views: 33
- Availability: In Stock
- $20.00
$15.00
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You save: $5.00 (25%)
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