[GreenKeys] Replacement for 6017 type transfer keys

[Don Robert House]

Someone asked about 6017 Transfer Keys.
They were in use in the Bell System for almost a century.
Many different configurations for many different applications.
I was most familiar with the 6017AP key which was used as a loopback  
key for testing facilities.

About 1970 WECo discontinued the 6017 family and introduced the family  
of TK switches.

Here is a handy one sold by Mike Sandman in Roselle, IL
http://www.sandman.com

Don K9TTY

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