K&E Pamphlet "How to Choose a Pocket Slide Rule" by Don Herold
This pamphlet was published by K&E in 1957. This pamphlet is the first know introduction of the 4181-1C, 4168C, 4141-1C, 4153-1C, and 4150-1C versions of the 5" slide rules in the mid 1950s.
This pamphlet is from the Collection of: Clark McCoy
Scanes by: Clark McCoy