Vintage Keuffel & Esser K+E 4055 Favorite Slide Rule w/ Case & Box

Description

Keuffel & Esser model 4055 slide rule in original black leather case.
Slide rule is in excellent condition.
Front scale A [ B C ] D, back scale [ S L T].
All pieces slide nicely.
Serial number 795723.
Black case has snap closure, in very good condition with some wear.
See images as part of description and item condition.
Shipping to the United States only.