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Ad for loud speakers (radio amplifier), variometers, dials, and the variocoupler, from the General Radio Corporation of Philadelphia. Here's a picture of one that survives to this day. Published in the October, 1922 issue of RADIO NEWS.
Source: Magazine collector Steve Davis
Restoration by: magscanner
- Created on
- Wednesday 17 February 2010
- Posted on
- Wednesday 17 February 2010
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