Keuffel & Esser Co Slide Rule & Paraglide w/ brochures

Description

Here is a vintage Keuffel & Esser Company K-12 slide rule (# 68-1892) and a Paraglide protractor-plotter made by C-Thru.   Both items are made from plastic.  The brochure that comes with the slide rule dates to 1961.
The slide rule and protractor-plotter show no visible signs of damage.   The brochures have heavy creasing from being folded but show no other signs of damage.
I will ship this item USPS Parcel Post.
Please feel free to ask questions and thank you for looking!