Up for bid is a copy of the 1914 National Radio Institute MRI Iron Core A.F. Power Transformers manual.

The National Radio Institute-McGraw Hill Continuing Education Center was a private post-secondary for-profit school, specifically a correspondence school, based in Washington, D.C., in business from 1914 to 2002. It originally trained students desiring to become radio operators and technicians

Condition is Used.

JL