Electronemchanical

The Teletype Model 28 is a product line of page printers, typing and
non-typing tape perforator and tape reperforators, fixed head single
contact and pivoted head multi-contact transmitter-distributors, and
receiving selector equipment.

Teletype Corporation's Model 28 line of communications terminals was
first delivered to the US Military in 1951 and commercially
introduced in 1953.

Teletype Corporation discontinued Model 28 production in 1981.


The Model 35 line, built for ASCII, used a similar mechanical structure
and shared numerous parts.