Keuffel & Esser 4055
(1935)
slide rule
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ManufacturerKeuffel & Esser
Model4055
Serial No.524176
Scale length25 cm
Overall length26.9 cm
Width2.8 cm
Body/Slide materialsCeluloid on Mahogany
Post materialsn/a
Cursor materialsCeluloid / Metal / Glass
Scales A [B C] D
  [S L T]
AccessoriesBlack cardboard case labeled "K&E / Favorite / trade mark / Slide Rule / 4055".
4185B Magnifier
Notes
Tag No.KE-4055
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