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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 4161-1 5″ Plastic Polyphase Mannheim

  • Improved Cursor
    • Keuffel & Esser 4161-1 5″ Plastic Polyphase Mannheim – 40220
  • No Cursor
    • Keuffel & Esser 4161-1 5″ Plastic Polyphase Mannheim – 024555
  • See Also:
    • 9061-1 (4161-1) 5″ Plastic Polyphase Mannheim
    • 68 1586 (4161-1) 5″ Modern Polyphase (Jet Math)
Mike Frey Slide Rules
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