Radio-Lectric no. 420 template use? Wondering what this would be used for, found in a box with some radio rule circuit diagrams. Knob turns to loosen/tighten, all three metal pieces slide.

Computers—The machines we think with

Technician's Heating Catalog by F.W. Webb Company - Issuu

Modifications for the ICOM - RogerK

Computer simulation techniques for forecasting snowmelt runoff

The Box Radio : 11 Steps - Instructables

Forums - Steve's BIG B Project

Set of metal tools. Tongs look to about two feet long. Includes files, tong with a point and fly nut to hold something, and what appears to be hole punches. : r/whatisthisthing

Set of metal tools. Tongs look to about two feet long. Includes files, tong with a point and fly nut to hold something, and what appears to be hole punches. : r/whatisthisthing

Radio-TV-Experimenter-1965-10-11

Mathematical model of spring flood formation and possibilities of its use for short-range forecasting

The Box Radio : 11 Steps - Instructables