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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Long and Long Scale Slide Rules
K&E / 4013 Thacher
Keuffel & Esser
USA
Metal/wood/paper
c1920
940 cm
Basic Calculations
Notes:
Serial no. 4320 long-scale model with replacement magnifying cursor.
Image 1
Image 2
Image 3
Image 4
Image 5
Image 6
Image 7
Image 8
