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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 68 1617 (4053-3) 10″ Polyphase Mannheim

  • DMS Trigonometry Scales
    • 68 1617 (4053-3) 10″ Polyphase Mannheim – 941324
    • 68 1617 (4053-3) 10″ Polyphase Mannheim – 201058
  • D Series – Decimal Trigonometry Scales
    • D68 1617 (D4053-3) 10″ Polyphase Mannheim – 030078
    • D68 1617 (D4053-3) 10″ Polyphase Mannheim – 660040
Mike Frey Slide Rules
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