Vintage Carr Lane Handy Multipliers and Trigonometry Tables for Engineers booklet. Published in 1973 by Carr Lane Manufacturing Co., this reference guide provided engineers with quick access to multipliers and trigonometric tables before the widespread use of calculators. A unique collectible from the early 1970s, priced originally at just 15¢.

  • Title: Carr Lane Handy Multipliers and Trigonometry Tables for Engineers

  • Publisher: Carr Lane Manufacturing Co., St. Louis, Missouri

  • Year: 1973 (Copyright)

  • Pages: Compact engineering reference tables

  • Original Price: 15¢ (printed on cover)

  • Vintage Appeal: Great collectible for engineers, math enthusiasts, or vintage technical reference collectors