Vintage Electronics Slide Chart Lot - Waveguide, Capacitor, Remex Tape Length Ca For Sale

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Vintage Electronics Slide Chart Lot - Waveguide, Capacitor, Remex Tape Length Ca:
$37.99

Up for sale is a fantastic vintage lot of three (3) mid-century electronic and engineering slide calculators/charts. These are incredible pieces of Cold War-era industrial history, highly collectible for electrical engineers, ham radio buffs, or vintage computing enthusiasts.
The bundle includes:
1. Electronic Specialty Co. / Technicraft Waveguide Selector: Used for calculating parameters on Series 74 Flex-O-Twist and Series 71 Interlocked flexible waveguides by Frequency (KMC/S). Excellent piece of niche microwave/RF engineering ephemera.
2. Remex Electronics Calculator Card: Dual-purpose reference chart featuring circuit/electronic data on one side and a specialized industrial tape length/feet calculator scale on the other. Essential early data/automation media history.
3. Capacitor Calculator Slide Chart: Classic technical slide scale used for quickly calculating capacitance, tolerances, and electrical properties in mid-century electronic repairs and design.
Condition Note:
All three charts are in original vintage condition with expected light aging. The text is crisp and fully legible, and the inner slide inserts move smoothly as intended. (Please view all photos carefully to judge exact condition for yourself).