what is this NCR modem? what did it go to?

Fred Cisin cisin at xenosoft.com
Sun Nov 26 15:36:48 CST 2017

The NCR 260  (first part of the part number) was a KSR portable 
thermal printing terminal.
Somewhat similar to the Silent 700.

But, the NCR 260 had an integrated modem with acoustic coupler

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