Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Disk on plate
FNS-3 Nautical Slide Rule
Felsenthal and SonsUSA
est 1940's20 cm x 20 cmNautical

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