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Manufactured By:
Precision & Thread Grinder Mfg. Co.
Philadelphia, PA

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Title: 1923 Ad - Multi-Graduated Precision Grinder and Precision Thread Lead Variator
Source: "American Machinist," Vol. 58, No. 26, June 28, 1923, Pg. 80.
Insert Date: 5/26/2020 12:56:45 PM

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