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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Disk on plate
FNS-3 Nautical Slide Rule
Felsenthal and Sons
USA
Plastic
est 1940's
20 cm x 20 cm
Nautical
Notes:
"1) Used to calculate time, distance and speed problems 2) This unit is almost identical to Weems and Plath slide rules sold currently"
Image 1
Image 2
