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Classic Rotary Phones Forum

Telephone Switching => Intercom & Interphone Systems => Topic started by: paul-f on March 04, 2017, 02:38:36 AM

Title: NCR Charge Phone Credit System
Post by: paul-f on March 04, 2017, 02:38:36 AM
There has been some basic info on my site since 2009 -- mainly covering 1940s vintage equipment.

I recently added some historical info on ca. 1909 and 1920s vintage systems.  It's an interesting evolution.

http://www.paul-f.com/NCRcredit.html (http://www.paul-f.com/NCRcredit.html)
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