Original vintage oil and gas magazine ad, THE BROWN INSTRUMENT COMPANY of Philadelphia, PA. Brown Potentiomenter Pyrometer. Pictured is Socony Vacuum Oil Company in Paulsboro, NJ. Temperature are Safeguarded at 90 Different Points on the Duo-Sol Process. Old 1934 dated petroleum industry advertisement. Approximate size 10 x 13 inches.
- SKU p878
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