Vintage Lawrence Wire Voltage Drop Calculator Slide Rule
RARE & HARD TO FIND
A MUST for Electricians, Trouble Shooters, Millwrights, Electrical Suppliers, Salesmen, Etc.
This is a vintage simple voltage drop calculator from 1946 manufactured by Lawrence Engineering Service. Lawrence started out as a 10 person shop owned by George Lee Lawrence and Vivian C. Lawrence back in 30s. They've developed many slide rules to help engineers calculate a wide variety of different measurements.
This link shows history of Lawrence slide rules.
We really appreciate the old design details of these precise gadgets that people used to use in their daily lives to figure out mathematical formulas and percentages before there ever were any computers. Perfect for someone who collects unique slide rules & calculators.
SIZE: 8" x 1.5
CONDITION: Very Good