LAWRENCE ENGINEERING Keuffel & Esser Fluor Slide Rules and K & E 4071 4070 Books

Description

LAWRENCE ENGINEERING Keuffel & Esser Fluor Slide Rules and K & E 4071 4070 Books
4 Slide rules and 2 Manuals
Slide Rules
Engineering Instruments Peru Indiana  -  Wood,  about 10 inches.  In good overall condition.
Lawrence Engineering Service  -  Wood,  about 10 inches.  In good overall condition.
Keuffel & Esser  -  Has some marks on the front and writing at bottom of front.  Quite worn.  Missing window slide?  4058 at end of slide.  Student's slide rule
Fluor  -  Could not determine maker but does indicate made in Japan.  All plastic except has what appears to be a leather or simulated leather sheath.
Manual
Keuffel & Esser Polyphase Duplex Decitrig No 4070 Manual,  Copyright 1939  -
Good condition.  Writing at top by previous owner.  More wear to covers than 4071.  Some yellowing.  Overall good.
About 7 7/8 x 5 1/4 inches and 87 pages.
Keuffel & Esser Polyphase Duplex Decitrig No 4071 Manual.
Copyright 1939
-
Good condition.  Some wear and use especially to covers.  Some yellowing.  Overall good.
About 7 7/8 x 5 1/4 inches and 87 pages.
All items are separate items except Fluor and sheath were together.  Manual not necessarily related to these slide rules.