1) Andrew 'Microwave Antenna System Computer' / 'Coaxial Transmission Line Selector' slide rule — Copyright 1979 Andrew Corporation, Bulletin 8525Q (9/79). Side 1: Microwave Antenna System Computer. Side 2: Coaxial Transmission Line Selector. With its instruction sleeve.

2) Raytheon AUTOSPEC slide-chart set — 'Filter Inductor Size Selector' and 'Transformer Size Selector', with 'Slide Chart Size Selector' sleeve and instruction sheets (transformer and filter inductor examples). Slide-Chart Copr. 1962 Perrygraf Corp., Raytheon Microwave and Power Tube Division, Magnetics Operation, 190 Willow Street, Waltham 54, Mass.

Condition: Used. The paper sleeves are yellowed and worn with age (worn edges), while the slide rules themselves appear in good condition. Please look closely at all photos — the photos form part of the description.

Sold as a single lot of the two items as photographed.

One is missing a little metal clip holder and maybe glue so it open on side a bit.