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  • Pocket-Watch Slide Rules - Paperback

    Pocket-Watch Slide Rules - Paperback

    Pocket-Watch Slide Rules - Paperback

    $39.95
    Sale price  $39.95 Regular price 
  • Slide Rules: Their History, Models, and Makers - Paperback

    Slide Rules: Their History, Models, and Makers - Paperback

    Slide Rules: Their History, Models, and Makers - Paperback

    $40.32
    Sale price  $40.32 Regular price