| Brand | ITW |
|---|---|
| Country of Origin | United States |
Check the listing for details. ITW Trigonometry Tables + Brown & Sharpe Decimal Chart Card. Condition: Used, Made in United States. Listed at 10.00 USD. Description: Original Illinois Tool Works (ITW) trigonometry and involute functions pocket reference book. Printed in Chicago, Illinois, this vintage machinist and engineer’s reference includes detailed sine, cosine, tangent, and involute tables used before electronic calculators were common. A classic toolroom companion for engineers, draftsmen, and machinists of the mid-1900s.
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