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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Pocket Watch Slide Rules
Halden / Calculex Desktop
Halden (Joseph)
UK
Metal/glass/paper
1915
Ø 12.7 cm
Basic Calculations
Notes:
Impressive and easier to use larger version of the true pocket version with identical scales.
Image 1
Image 2
Image 3
Image 4
Image 5
Image 6
