https://en.wikipedia.org/wiki/Teletype_Model_28

https://upload.wikimedia.org/wikipedia/commons/f/f7/Teletype_Model_28_KSR_Keyboard.png
Description 	
English: The keyboard has special function red keys that control local functions such as local line feed, keyboard lock and unlock, break, repeat and local carriage return. The FIGS (figures) and LTRS (letters) keys are in the bottom row of green keys, just above the space bar.
Date 	4 May 2012
Source 	my cell phone camera
Previously published: This is the first use of this photograph
Author 	Wa3frp
Licensing:
GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.



https://upload.wikimedia.org/wikipedia/en/9/93/Teletype_Corporation_advertisement_for_the_Model_28_Line_of_Equipment.jpg
Description 	This is a Teletype Corporation advertisement for the Model 28 Line of equipment that includes pictures and descriptions of the Model 28 Page Printers, Tape Readers and Tape Punches.
Source 	My private collection of Teletype Corporation bulletins and other literature.
Date 	circa 1960
Author 	 Teletype Corporation
Permission
(Reusing this file) 	
This work is in the public domain because it was published in the United States between 1929 and 1977 inclusive, without a copyright notice

A search of the USPTO records indicates that all trademark registrations for "Teletype" and "Teletype Corporation" are expired.