Concise 260

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Concise No. 260

Obverse
Obverse
Reverse
Reverse
  • Type: Circular
  • Size: 4 Inches / 10 cm
  • Material: Plastic
  • Scales:
    • Front: D / C CI A K
    • Back: D / S T ST L

Front and rear disks slide independently. Slide circles set flush to body. D scale runs clockwise on each side, with indexes aligned. Thus flipping the rule gives a reciprocal on the reverse D scale. Not possible to transfer a number from one side to the other without taking the reciprocal. Reverse shows advertisement "Figure on the Complete Caterpillar Line". Black soft plastic case and manual. Two currently in collection. Copy 1, Gift of Curt Hussa.

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