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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 4158 10″ Plastic Mannheim Beginner’s Slide Rule

  • 4158 10″ Plastic Mannheim Beginner’s Slide Rule – MHF-34
  • 4158 10″ Plastic Mannheim Beginner’s Slide Rule – MHF-591
  • 4158 10″ Plastic Mannheim Beginner’s Slide Rule – MHF-592

See Also: 68 1892 (4158) 10″ Plastic Mannheim Beginner’s Slide Rule

Mike Frey Slide Rules
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